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Is it possible to power an HTC HD2 without a battery or the back cover? I found one about an hour ago in my downtown area, missing a SIM card and missing the microSD card. As noted it doesn't have a back cover or a battery, so my intention was to attach a "standard" 5V/1A cell phone battery charger. I figured out from a picture of the battery that if I've got the HD2 flat on the display and I'm looking at the back, the positive terminal will be the one on the left but, when I attach the power supply (which I tested before this attempt, it works) leads using micro-alligator clips and push the power button (front of display, button furthest on the right, I think, never used one of these HD2's before) I get no response.
Now, the question is either a) am I not getting any response at all because the HD2 can't be powered up in this manner because there's no back cover or b) it's more likely to be completely toast because of the damage it apparently suffered in the drop that shattered the glass. The only damage (aside from the glass) is a very tiny scrape/scuff mark on the top right corner of the bezel - obviously that's where it hit the ground.
I don't own any of these apparently micro-USB style connectors (or is it mini-USB, I can't figure out which is which I suppose). Bleh, I just looked at a pic I found with Google Images, apparently it IS a micro-USB connector.
All blabbering aside, even if I had such a connector or a power supply using such a connector, is the phone going to even power up without a back cover on it or battery inside? I know a lot of devices become totally disabled when the back cover is removed (as my Dell Axim X51v does; as soon as I even throw the lock switch to unlock the back cover that disables the device totally.
Anyone able to provide some tips or suggestions? I have no way of knowing who it belongs to so I'm claiming it, and if I can verify it might work or does still function I might be willing to put some money into getting the glass/digitizer replaced, a new battery, power adapter, etc.
Anything at all would probably be quite helpful.
Thanks...
The HD2 works without back cover!
The HD2 doesnt work without battery...!! I've never heard of a mod to enable switching it on through micro-usb.
Be carefull you could be scammed...buying a phone in that state, because of the hit some other components may be damaged!! It depends on the price and money you're willing to risk!
no problem with powering on without the backcover. did that many times before.
but i guess its not possible without a battery...
DN41
Ah, ok, so the fact that there's the two metal 'dots' on the HD2 that apparently become a connection when the metal battery cover is in place don't affect powering it up, but no battery keeps it dead? Hrmmm...
Ok, if someone that owns an HD2 can confirm that it becomes very useful info. Take the back cover off, take the battery out, and tell me if plugging in a micro-USB cable (either from a computer USB port or from the AC adapter) allows it to function at all, and then try the same thing with the cover on (don't put the battery in, however).
So there's 3 possibilities:
1) It'll work off the micro-USB power with no battery and no cover
2) It'll work off the micro-USB power with just the cover installed but no battery
3) It'll work off the micro-USB power with no cover but with a battery installed
and actually the fourth possibility which doesn't matter in my case:
4) It'll work off the micro-USB power with the cover and the battery installed
Dammit I hate it when I find stuff like this and can't get it functional.
Again, thanks for any suggestions - and I didn't buy this phone, I found it a few hours ago, on the ground as I was walking home. I wouldn't buy something in this cosmetic condition unless I knew it was working even in spite of the cracked glass. I've owned iPhones with horribly shattered glass on them but they still function, even all the multitouch functionality is still working - that's my hope here, that this device will still work just fine and if it does then I'll pay to replace the glass/digitizer.
Thanks
Edit:
I think I just realized that the metal contacts on the inside of the back cover and those 'dots' could be because the HD2 is using that battery cover as a Wi-Fi antenna, plate-style antenna.
I just tested it for you. Without the battery in there is no starting it, period.
Might I suggest though that you ask around and find a mate with a microUSB, (you must have someone that has one), and plug it in when the battery contacts are jumped. It will probably work that way. I'm not going to try it because I have a perfectly good phone and have always mistrusted elec-trickery...
those spring loaded studs have been the subject of much discussion, with no definitive answer,, stop the cover rattling, grounding plate for the antenna, remnants of an unreleased car kit,,, who knows. certainly signal doesn't appear diminished with the cover off, and on the inside of the cover there is no coating on the metal where they connect, indicating a signal being passed so who knows.
i suspect simply attaching power to two contacts isn't enough because the third contact is expecting a signal of some kind? perhaps a connection from the battery charge protection circuits?
you could always buy a cheap copy battery from ebay, and just resell it if it doesn't work, or run a scam on your insurance with it? (did i just say that out loud??)
I'll say this again: I found the phone on the ground on the side of the street while walking home a few hours ago.
I don't use T-Mobile service and I have no intentions of using it as a phone; I already have a phone so I was going to use it as a portable media player sorta like an iPod touch if I can verify it works 100% and just needs a battery/back cover/replacement glass and digitizer. That's my intention at this point.
And I was thinking that yes it won't work at all without a battery so, thanks again for the info. I'll head out this morning to a T-Mobile store (actual T-Mobile and not a reseller) and see what they can tell me. Surely they'll have a battery/back cover and potentially an AC adapter to verify if it's 100% dead of somewhat functional even in spite of the busted glass.
Let's hope it works...
what about searching the owner?
DN41
Well, let's see:
- I can't power it up
- It has no SIM card
- It has no microSD card
- The only way to track the owner would be using the IMEI and I'd have to go to a T-Mobile store to do that, when that's done and they get the number, if the phone was stolen and then dumped in the trash/on the street where I found it, they call the police and I get in a bit of trouble for no good reason
That pretty much covers it.
okay, you're right...
i cant imagine how it landed there...
who would throw it just away?
sure that its a real phone and not a dummy?
DN41
DN41 said:
okay, you're right...
i cant imagine how it landed there...
who would throw it just away?
sure that its a real phone and not a dummy?
DN41
Click to expand...
Click to collapse
i was in a thread yesterday where some guy talked about how he dropped his phone by accident whilst 'driving along with it in his hand, with his arm out of teh window', so yea, some people are , , well, insert your own noun here
oh no...how can you hold your arm out of the windows with a 500€ phone in your hand?
i just cant understand some people...that doestn go in my mind...
DN41
samsamuel said:
i was in a thread yesterday where some guy talked about how he dropped his phone by accident whilst 'driving along with it in his hand, with his arm out of teh window', so yea, some people are , , well, insert your own noun here
Click to expand...
Click to collapse
I thought the same!
br0adband said:
they call the police and I get in a bit of trouble for no good reason
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Click to collapse
Not really mate. I found an iphone 4 yesterday and managed to get it back to its rightful owner. Took a couple of hours out of my day but what else could i do?
sike222 said:
Not really mate. I found an iphone 4 yesterday and managed to get it back to its rightful owner. Took a couple of hours out of my day but what else could i do?
Click to expand...
Click to collapse
Well, Yeah, with an iPhone 4 what else WOULD you do if you don't want the surgery to be able to use it! LOL
Also think if it was your phone! I'd be absolutely gutted, and very glad to get it back. But maybe it's unregistered (through the IMEI) or not been reported as missing.
In the UK (don't know about elsewhere) if you report that you found something to the police (I found a £50 note) and no one can show that they own it then it's yours after about 28 days.
Unless you have really dumb cops then you shouldn't get into trouble if you take it in!
On the other hand you may find the battery and/or cover if you look carefully in the area where you found the phone.
Sam.
br0adband said:
Ah, ok, so the fact that there's the two metal 'dots' on the HD2 that apparently become a connection when the metal battery cover is in place don't affect powering it up, but no battery keeps it dead? Hrmmm...
Ok, if someone that owns an HD2 can confirm that it becomes very useful info. Take the back cover off, take the battery out, and tell me if plugging in a micro-USB cable (either from a computer USB port or from the AC adapter) allows it to function at all, and then try the same thing with the cover on (don't put the battery in, however).
So there's 3 possibilities:
1) It'll work off the micro-USB power with no battery and no cover
2) It'll work off the micro-USB power with just the cover installed but no battery
3) It'll work off the micro-USB power with no cover but with a battery installed
[snip]
Thanks
Edit:
I think I just realized that the metal contacts on the inside of the back cover and those 'dots' could be because the HD2 is using that battery cover as a Wi-Fi antenna, plate-style antenna.
Click to expand...
Click to collapse
I think those contacts are just to ground the back cover to stop it causing interference. It doesn't seem to affect the phone if I don't have it on or am using the plastic cover with my big battery.
On a similar theme, does anyone know if it is possible to power the HD2 from the micro USB supply while I swap batteries. I don't want to have to do a soft reset which loses what you are doing. But I'm worried that without the battery to absorb the power there is a risk of damaging the circuits?
I don't want to just try it because I already blew my main board by powering the USB through a cheep adapter and a Nokia charger that supplied too much power and had I to get it repaired/replaced. I'm hoping someone already knows
Sam
samsamuel said:
i was in a thread yesterday where some guy talked about how he dropped his phone by accident whilst 'driving along with it in his hand, with his arm out of teh window', so yea, some people are , , well, insert your own noun here
Click to expand...
Click to collapse
did we ever get an answer as to why that, im going to select the noun "twat" was dangling his hd2 out of the window @ 40mph??
I need closure on that one.....
So in the beginning of July I dropped my Rezound in some water, and it voided those water sensors on the back, and thought it has been functioning fine, you can notice that there is/was water under the very back of the screen when it is a white screen and it messes up from here to there but has worked alright. So I used my upgrade in March to get this phone and Verizon basically said I can buy a new phone at full price or else I'm screwed and stuck with it. Besides just finding someone on craigslist, ebay, etc.. anyone got any ideas on how I can get a new Rezound on the cheap or anything else 4g from Verizon on the cheap that isn't a turd, or somehow I can get a discount?
Just looking for any input, I'm fine with it now, but it's just annoying, and I'm not sure how long the phone will be operational.
Burkejt1 said:
So in the beginning of July I dropped my Rezound in some water, and it voided those water sensors on the back, and thought it has been functioning fine, you can notice that there is/was water under the very back of the screen when it is a white screen and it messes up from here to there but has worked alright. So I used my upgrade in March to get this phone and Verizon basically said I can buy a new phone at full price or else I'm screwed and stuck with it. Besides just finding someone on craigslist, ebay, etc.. anyone got any ideas on how I can get a new Rezound on the cheap or anything else 4g from Verizon on the cheap that isn't a turd, or somehow I can get a discount?
Just looking for any input, I'm fine with it now, but it's just annoying, and I'm not sure how long the phone will be operational.
Click to expand...
Click to collapse
Ur pretty much screwed bro
Do you not have insurance on your line?
Check out TeamBAMF's marketplace... they have some Thunderbolts and Rezounds for sale there.
Plug it into a charger, wrap it in a paper towel and put it in a bag of dry rice and let it sit for a few days. I've saved an iPhone and a camera that way.
Antoine.WG said:
Plug it into a charger, wrap it in a paper towel and put it in a bag of dry rice and let it sit for a few days. I've saved an iPhone and a camera that way.
Click to expand...
Click to collapse
Putting it on a charger doesn't even make any sense
Antoine.WG said:
Plug it into a charger, wrap it in a paper towel and put it in a bag of dry rice and let it sit for a few days. I've saved an iPhone and a camera that way.
Click to expand...
Click to collapse
Why do you plug in the charger?
Perhaps a little heat to help drive out the water? Just my guess.
Sent from my ADR6425LVW using Tapatalk 2
Burkejt1 said:
So in the beginning of July I dropped my Rezound in some water, and it voided those water sensors on the back, and thought it has been functioning fine, you can notice that there is/was water under the very back of the screen when it is a white screen and it messes up from here to there but has worked alright. So I used my upgrade in March to get this phone and Verizon basically said I can buy a new phone at full price or else I'm screwed and stuck with it. Besides just finding someone on craigslist, ebay, etc.. anyone got any ideas on how I can get a new Rezound on the cheap or anything else 4g from Verizon on the cheap that isn't a turd, or somehow I can get a discount?
Just looking for any input, I'm fine with it now, but it's just annoying, and I'm not sure how long the phone will be operational.
Click to expand...
Click to collapse
You can buy replacement stickers on Amazon.... Replace the stickers and warranty that ****
Sent from my ADR6425LVW using xda premium
topgun1953 said:
Why do you plug in the charger?
Perhaps a little heat to help drive out the water? Just my guess.
Sent from my ADR6425LVW using Tapatalk 2
Click to expand...
Click to collapse
Exactly. Putting it on the dashboard of your car works too, just make sure it's completely covered in rice so it doesn't get too hot. After all, you can bake cookies on your dashboard nowadays.
Oh! I forgot to mention taking the back off, for better airflow. Removing the battery, SIM and SD card don't hurt either, but I don't think the charger will work if you remove the battery. None of my other phones ever have but I've never tried it with my Rezound.
Antoine.WG said:
Exactly. Putting it on the dashboard of your car works too, just make sure it's completely covered in rice so it doesn't get too hot. After all, you can bake cookies on your dashboard nowadays.
Oh! I forgot to mention taking the back off, for better airflow. Removing the battery, SIM and SD card don't hurt either, but I don't think the charger will work if you remove the battery. None of my other phones ever have but I've never tried it with my Rezound.
Click to expand...
Click to collapse
No, it doesn't work without a battery. Unless your in bootloader.
Sent from my ADR6425LVW using Tapatalk 2
Antoine.WG said:
Exactly. Putting it on the dashboard of your car works too, just make sure it's completely covered in rice so it doesn't get too hot. After all, you can bake cookies on your dashboard nowadays.
Oh! I forgot to mention taking the back off, for better airflow. Removing the battery, SIM and SD card don't hurt either, but I don't think the charger will work if you remove the battery. None of my other phones ever have but I've never tried it with my Rezound.
Click to expand...
Click to collapse
Putting it on the charger can make the water damage worse. Put it in the sun or something but don't put it on the charger. Water + electricity = kablam
AshtonTS said:
Putting it on the charger can make the water damage worse. Put it in the sun or something but don't put it on the charger. Water + electricity = kablam
Click to expand...
Click to collapse
Just like Pokémon.
Sent from my viperRez
wlmeng11 said:
Just like Pokémon.
Sent from my viperRez
Click to expand...
Click to collapse
exactly!
Tag798 said:
You can buy replacement stickers on Amazon.... Replace the stickers and warranty that ****
Sent from my ADR6425LVW using xda premium
Click to expand...
Click to collapse
Whaaat theres no way
Thanks for the input everyone
AshtonTS said:
Putting it on the charger can make the water damage worse. Put it in the sun or something but don't put it on the charger. Water + electricity = kablam
Click to expand...
Click to collapse
He did say it's been working fine other then the water in the phone...
You can check the marketplace here on XDA too. I've seen some rezounds for around $200.
We're only talking about 5V, 1A, which isn't a lot of power. Yes, at high voltage or high current, water and electricity don't mix but I'm sure he's charged it since he dropped it. I've saved devices in exactly this way in the past. Screens are the the hardest part to save, though. The touchscreen on my old iPhone needed to be replaced because the bottom half stopped responding to touches and the camera has a very faint shadow in the screen if you hold it at a certain angle in bright light. Both devices otherwise work perfectly but I hardly use them any more because they've been replaced by my Rezound.
Recently my wife upgraded her phone and I took over her old rezound to replace my own since her 4g switching was always better. Both are s-off and have 2.28 hboot with newest radios. Having 2 rebounds I figured I may set both up and test toms and switch back and forth. Problem is my original rezound doesn't get any 4g service now that I have played around with it. It's my original sim card I am switching back and forth and it works fine in my wife's phone.
I even ran a stock run and tested for 4g and still no go. New Rom then...and still no 4g. Is the phone broken or am I missing something here? This phone used to have 4g with this same sim card since it was my original phone and my sim.
A couple months ago I did replace the screen on this currently no 4g phone due to cracks. It worked great until I recently started switching the sim back and forth testing roms.
Thanks for any insight, John
If I remember right, you have to remove the radios to gain access to the LCD and digitizer assembly, if you didn't seat them right, that may be your problem. Over time the radio "plug" "fell" out of it's seat.
Or if the backing isn't on all the way, it would cause signal issues also. Try with her back plate on your phone.
Sent from my dlx using xda app-developers app
Thanks for the help. I did try her backing but it didn't help. I didn't realize there were radio plugs in there that might haven't loosened. I have some new screen adhesive tape I would like to put on anyways so I will attempt surgery again and look for loose ends.
Okay, I was thinking about another phone screen replacement I did a few months back and not the Rezound. The radio chip is part of the motherboard and has prongs that connect to the antenna on the backing plate. Maybe they are not connecting correctly.
When you get your phone apart to reapply the adhesive use some "QD electric cleaner" to clean the contacts. Don't worry, if you use that specific product, it will not damage the phone. It is designed to be sprayed on all electronic devices. The QD part means it has a chemical in it to "Quick Dry". Imagine it as a better form of rubbing alcohol.
Just be sure the battery is removed, it will still cause damage if there is current running through the phone. I used this cleaner directly on my old LG Spectrum's LCD during screen replacement (damn fingerprint, lol) and it worked great.
Sent from my dlx using xda app-developers app
I will try that and check the prongs. There were no loose connectors so I assumed it was broken.
Spilled a glass of water from my bedside table on the phone, put the phone in rice for a day and everything is now fine except for bluetooth pairing. I have tried different ROMs but no dice, simply can't find any bluetooth device.
Is there any method to test the bluetooth module or back connections to troubleshoot? I also have a spare Evo LTE from a family member that's screen completely fried, and can harvest parts from if it's not ridiculously difficult.
Thanks
Not sure about the bluetooth, but the EVO 4G LTE is pretty easy to take apart. If no one can help you on the bluetooth, I'd swap the insides from the screen damage one and put it into yours. YouTube has a lot of videos showing you how. Here's a link that might help on the teardown:
http://youtu.be/LiKpHr8RLBs
Good luck!
Sent from my EVO using Tapatalk 2
puhiniho said:
Not sure about the bluetooth, but the EVO 4G LTE is pretty easy to take apart. If no one can help you on the bluetooth, I'd swap the insides from the screen damage one and put it into yours. YouTube has a lot of videos showing you how. Here's a link that might help on the teardown:
http://youtu.be/LiKpHr8RLBs
Good luck!
Sent from my EVO using Tapatalk 2
Click to expand...
Click to collapse
Thanks, I was originally thinking that route too but the other phone is totally jacked from a hard life of lots of drops without a case; I can only hope that the internals are fine beyond the deathblow that was the screen...
You may want to try swapping just the sd card cover. That cover is where the antennas are. Since my 2 year old bent mine -slightly- I have to keep firm pressure on the cover to maintain bluetooth connections.
Sent from my EVO using xda app-developers app
bootlooper said:
You may want to try swapping just the sd card cover. That cover is where the antennas are. Since my 2 year old bent mine -slightly- I have to keep firm pressure on the cover to maintain bluetooth connections.
Sent from my EVO using xda app-developers app
Click to expand...
Click to collapse
Amazing, you're right. If I apply pressure to the back cover Bluetooth functionality completely returns. Unfortunately it makes no difference with which backing I use (tried three), so the problem is with the connections on the phone. Is this a very common problem?
EDIT:
http://forum.xda-developers.com/showthread.php?t=1817148
Will post back with result of modification
Hello.
So to make a veeeery long story short, the phone leaked water in a lake at about 0.5 meters depth after a minute or two with flaps definitely closed (checked 5-10 times before submersion). The screen then flickered and died.
Phone gets sent away to a service center, tested and results unsurprisingly say its watertight so must be user fault. Sony and service provider refuse to help me in any way to fix the broken phone, so basically they say i have to pay it as normal (it was 4 weeks old at time of damage).
I received the phone back after countless phone calls to sony and service provider trying to get them to take responsibility, especially sony, but to no avail.
So now im trying to fix it myself. I took the phone apart, and the screen connector at the bottom was fried as expected. I bought a new screen and flex connector cable but still my screen wont show. The touchscreen works perfect, and so does the phone. When i connect it to my tv via MHL it works flawlessly. Every function including the new touchscreen works perfect, just that the screen is black on the device.
Am i missing something?? I really want to get this working so i can say IN YOUR FACE to this stupid company SONY. Im thinking the only thing it could be now is some faulty component on the mainboard regarding screen output, seems strange though that everything works perfect via MHL, especially the touchscreen.
Anybody have any ideas? Would be greatly appreciated if anyone can share similar experiences!
Cheers, Vincent from Sweden.
i
vinnibinni said:
Hello.
So to make a veeeery long story short, the phone leaked water in a lake at about 0.5 meters depth after a minute or two with flaps definitely closed (checked 5-10 times before submersion). The screen then flickered and died.
Phone gets sent away to a service center, tested and results unsurprisingly say its watertight so must be user fault. Sony and service provider refuse to help me in any way to fix the broken phone, so basically they say i have to pay it as normal (it was 4 weeks old at time of damage).
I received the phone back after countless phone calls to sony and service provider trying to get them to take responsibility, especially sony, but to no avail.
So now im trying to fix it myself. I took the phone apart, and the screen connector at the bottom was fried as expected. I bought a new screen and flex connector cable but still my screen wont show. The touchscreen works perfect, and so does the phone. When i connect it to my tv via MHL it works flawlessly. Every function including the new touchscreen works perfect, just that the screen is black on the device.
Am i missing something?? I really want to get this working so i can say IN YOUR FACE to this stupid company SONY. Im thinking the only thing it could be now is some faulty component on the mainboard regarding screen output, seems strange though that everything works perfect via MHL, especially the touchscreen.
Anybody have any ideas? Would be greatly appreciated if anyone can share similar experiences!
Cheers, Vincent from Sweden.
Click to expand...
Click to collapse
explain more about phone instead of situation and problem with service center
the touch panel is ok but display is died!
but the phone can boot with another display?!
Geeks Empire said:
explain more about phone instead of situation and problem with service center
the touch panel is ok but display is died!
but the phone can boot with another display?!
Click to expand...
Click to collapse
Hello.
The phone has booted ever since it got water damaged, even with the bad screen. Yes the touch panel works perfect but no display, and i can see and use everything on the phonebon my tv via mhl cable. I even updated firmware whilst using mhl to see if it would help but still no picture on the device.
I have replaced the touch screen and the flex ribbon cable that connects screen to mainboard. I have also removed mainboard and cleaned it with 95% alcohol incase some water or dirt causing a short circuit somewhere.
The mainboard looks fine, and everything works apart from the visual screen. Nothing is overheating. Im really baffled as to what could be wrong, but it surely must be something on the mainboard?
i
vinnibinni said:
Hello.
The phone has booted ever since it got water damaged, even with the bad screen. Yes the touch panel works perfect but no display, and i can see and use everything on the phonebon my tv via mhl cable. I even updated firmware whilst using mhl to see if it would help but still no picture on the device.
I have replaced the touch screen and the flex ribbon cable that connects screen to mainboard. I have also removed mainboard and cleaned it with 95% alcohol incase some water or dirt causing a short circuit somewhere.
The mainboard looks fine, and everything works apart from the visual screen. Nothing is overheating. Im really baffled as to what could be wrong, but it surely must be something on the mainboard?
Click to expand...
Click to collapse
I got same issue on Galaxy S4 but that wasn't water proof so this type of damage was normal for it.
have u tried ur display on another board?
- as Sony said it was user fault... after phone get wet have u tried to dry it with heat?
+ as i read the warranty agreements when u open phone by urself or others (non official center) it will void the warranty.
anyway If ur display not working with another board so thr is problem in display panel and not anything on board.
Please Inform me if u got any info or result of this damage
Thanks
:good:
Geeks Empire said:
I got same issue on Galaxy S4 but that wasn't water proof so this type of damage was normal for it.
have u tried ur display on another board?
- as Sony said it was user fault... after phone get wet have u tried to dry it with heat?
+ as i read the warranty agreements when u open phone by urself or others (non official center) it will void the warranty.
anyway If ur display not working with another board so thr is problem in display panel and not anything on board.
Please Inform me if u got any info or result of this damage
Thanks
:good:
Click to expand...
Click to collapse
Yes the phone is thoroughly dried out. I only opened the phone after i had received it back from sony service. They said it wasnt covered by warranty because it was water damaged and was caused by the user (even though both water indicators behind the 2 flaps are still white and not been exposed to water), and they said that they never repair water damaged phones.
Thats why i decided to open it and try to fix it myself, i had nothing (more) to lose!
I havent tried the new display on another board, thats exactly what i want to do but cant get hold of a new board. I've even been taking apart previous smartphones to see if the display can be connected to it somehow just so i can confirm it works. But the probability is that it does work, as the first "broken" screen worked in the same way as this one, touchscreen fine but no display. Thats why i changed the flex cable also, i thought it must be that when the mainboard seems to be doing everything else perfectly.
Does the problem have to be in one of those 3 components? Screen, flex cable, mainboard, or have i missed something?
Thanks
vinnibinni said:
Yes the phone is thoroughly dried out. I only opened the phone after i had received it back from sony service. They said it wasnt covered by warranty because it was water damaged and was caused by the user (even though both water indicators behind the 2 flaps are still white and not been exposed to water), and they said that they never repair water damaged phones.
Thats why i decided to open it and try to fix it myself, i had nothing (more) to lose!
I havent tried the new display on another board, thats exactly what i want to do but cant get hold of a new board. I've even been taking apart previous smartphones to see if the display can be connected to it somehow just so i can confirm it works. But the probability is that it does work, as the first "broken" screen worked in the same way as this one, touchscreen fine but no display. Thats why i changed the flex cable also, i thought it must be that when the mainboard seems to be doing everything else perfectly.
Does the problem have to be in one of those 3 components? Screen, flex cable, mainboard, or have i missed something?
Thanks
Click to expand...
Click to collapse
Yes, it should be those factors. From what you have stated, its most probably the connector on the main board. Before you make more purchases, try to take it to a shop and ask them to test the screen on another phone, so you can see if its the screen or not. It MIGHT be a faulty flex cable that you just purchased, hopefully, since its the cheaper solution. I actually bought one in ebay that was water damaged, changed the screen, middle frame and flex cable, and have a brand new refurbished Z2, good for me the main board was intact. I would take the board out, wash it with 95% alcohol again with a soft toothbrush to brush impurities off the connector piece. Then spray it a little with electrical spray and leave it in rice to thoroughly dry out overnight and try all the connections again. Look through the main board with a magnifying glass and see if anything obvious burned out, the smallest connection can cause problems.
If all fails, then take it to a shop to test the screen or the main board, hopefully they are friendly enough to do it.
Good luck buddy. :good:
elbello said:
Yes, it should be those factors. From what you have stated, its most probably the connector on the main board. Before you make more purchases, try to take it to a shop and ask them to test the screen on another phone, so you can see if its the screen or not. It MIGHT be a faulty flex cable that you just purchased, hopefully, since its the cheaper solution. I actually bought one in ebay that was water damaged, changed the screen, middle frame and flex cable, and have a brand new refurbished Z2, good for me the main board was intact. I would take the board out, wash it with 95% alcohol again with a soft toothbrush to brush impurities off the connector piece. Then spray it a little with electrical spray and leave it in rice to thoroughly dry out overnight and try all the connections again. Look through the main board with a magnifying glass and see if anything obvious burned out, the smallest connection can cause problems.
If all fails, then take it to a shop to test the screen or the main board, hopefully they are friendly enough to do it.
Good luck buddy. :good:
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Click to collapse
Sounds like good advice elbello
Good to know that you have managed to fix a water damaged Z2 using the same mainboard, hopefully i can have the same luck.
So you think it could be the flex cable? Are they known to break easily?
I have already cleaned the board twice with alcohol, maybe using electrical spray might help, and i will check it with a magnifying glass aswell.
Hopefully i can find a shop that will test the screen for me, but this is Sweden, the place where no favours are done, and where everything has to be sent away and fixed by professionals!
Thanks for the replys guys
I have just checked the whole mainboard with a magnifier, and found no oxidation anywhere. I found quite a bit of dirt in some places, and i have once again cleaned the screen connector with 95% alcohol and also the other side of the board behind the screen connector. I dont have any electrical spray at this time so cant test with that.
Another thing i have realised is that there is visual damage to two contact points that are located at the bottom of the phone, very close to where the flex cable connects to the lcd screen. What are these two contacts for, and could they be causing the problem? I will attach an image of them.
Thanks.
vinnibinni said:
I have just checked the whole mainboard with a magnifier, and found no oxidation anywhere. I found quite a bit of dirt in some places, and i have once again cleaned the screen connector with 95% alcohol and also the other side of the board behind the screen connector. I dont have any electrical spray at this time so cant test with that.
Another thing i have realised is that there is visual damage to two contact points that are located at the bottom of the phone, very close to where the flex cable connects to the lcd screen. What are these two contacts for, and could they be causing the problem? I will attach an image of them.
Thanks.
Click to expand...
Click to collapse
From that picture, I dont think that affects the screen at all. Bad thing is you cant try the two pieces you bought with another board so you can narrow the problem down.
I doubt the electrical spray will make wonders, it just good to clean dirt and make the contacts react better after oxidation, but if you state they are clean...
Think your only options is to consider it a loss, sell it in ebay for parts and stuff, or try getting a new flex and see if it was that, but if it wasnt, its like throwing money away. I would say the same for the screen, but those go for $100+ easily.
elbello said:
From that picture, I dont think that affects the screen at all. Bad thing is you cant try the two pieces you bought with another board so you can narrow the problem down.
I doubt the electrical spray will make wonders, it just good to clean dirt and make the contacts react better after oxidation, but if you state they are clean...
Think your only options is to consider it a loss, sell it in ebay for parts and stuff, or try getting a new flex and see if it was that, but if it wasnt, its like throwing money away. I would say the same for the screen, but those go for $100+ easily.
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Yea i was thinking about selling it for parts, but its not really worth much without a working mainboard. I will probably just keep it and wait till i can get hold of a new board. How much do you think a new board would cost? I cant find one anywhere at the moment when searching on ebay/google.
Wish i had access to a working board for testing
Hello,
I have the same problem ... black screen on the tv works perfectly, xperia z2 also drowned after 10 seconds under water .... someone back to life solved the screen, that you have replaced?
best regard.
Oscar
vinnibinni said:
Yea i was thinking about selling it for parts, but its not really worth much without a working mainboard. I will probably just keep it and wait till i can get hold of a new board. How much do you think a new board would cost? I cant find one anywhere at the moment when searching on ebay/google.
Wish i had access to a working board for testing
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Click to collapse
Hello ..... no answer .....
I'll buy on aliexpress touch screen digitizer to replace it, anyone know if the screen will return to work? I have to replace more parts? thank you ...
Best Regard
Oscarrrr
Hello,
I'm now in the exact same position.
Water damaged, Touchscreen is still working I can enter recovery any press stuff but no display only shows black.
Had my screen replaced in a shop here but same problem prevails.
They told me to replace Mainboard 3500 THB.
But they didnt have one right then.
He could fix it?
vinnibinni said:
Yea i was thinking about selling it for parts, but its not really worth much without a working mainboard. I will probably just keep it and wait till i can get hold of a new board. How much do you think a new board would cost? I cant find one anywhere at the moment when searching on ebay/google.
Wish i had access to a working board for testing
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Click to collapse
he could you solve your problem? It happens to me the same with a z2 . I board bought new eh and the problem persists . you could help me?
Thinking of buying a used z2 with intermittent touchscreen issues. It works but seems to be intermittent it either takes multiple taps to work or it goes mad like your pressing the keys could this be down to water damage or possibly just a software issue and need re-flashing a ftf by clean install it's a totally stock z2 in mint condition for £50
[email protected] said:
Thinking of buying a used z2 with intermittent touchscreen issues. It works but seems to be intermittent it either takes multiple taps to work or it goes mad like your pressing the keys could this be down to water damage or possibly just a software issue and need re-flashing a ftf by clean install it's a totally stock z2 in mint condition for £50
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Click to collapse
It's probably hardware problem. Trust me, ghost touches make people go crazy,so don't buy it.
Sent from Xperia Z2
Luckily not from an iPhone = Yesterdays technology at tomorrows prices
Ghost touches are a digitizer problem right?
You can buy a new one for about 30-50$
Gesendet von meinem LENNY2 mit Tapatalk
Haldi4803 said:
Ghost touches are a digitizer problem right?
You can buy a new one for about 30-50$
Gesendet von meinem LENNY2 mit Tapatalk
Click to expand...
Click to collapse
Probably yes, but replacing it isn't so easy these days.
Sent from Xperia Z2
Luckily not from an iPhone = Yesterdays technology at tomorrows prices
try this : http://www.mobilerdx.com/2014/10/sony-xperia-z2-display-light-working-problem-solution.html
or this : http://gsm-friends.blogspot.co.id/2015/05/sony-xperia-z2-display-light-ic.html