[Q] LCDs and the usual stuff - Galaxy S II Q&A, Help & Troubleshooting

Hi All
Just started to buy up some old (spare or repair) I9100 phones with the hope of getting at least one which would work fully. I now have the final product but still no working screen! The screen I have looks perfect but shows nothing, I've tried the following:
Shine torch on screen to see if the LCD is damaged (nothing)
putting the screen on a second S2 (nothing, but it is not known if the second one actually works beyond making the right noises on start up)
Cleaned off all the connectors
I really don't want to take the screen off the frame so I wanted to know if anyone knows about testing/fault finding on the LCD with a multimeter type set up, like maybe a pin out or test points. Failing this I'm thinking of selling it all back on, so with that in mind does anyone have any advice on the IMEI and what to advertise.
oh and I've got some reasonable images of the LCD connector and some of the resistors which can be seen through the viewing ports in the frame for possible continuity tests.
Thanks in advance.

Related

[Hardware] Galaxy S3 display no power

Hi there,
my girlfriend smashed her Galaxy S3 sometimes. Now it's done, the glass is broken in the upper left corner. The screen worked fine. A few days later she dropped it and dropped it again... i think she needs some wooden sticks to make a bushfire to call her friends. After some drops the screen stopped working fine. The screen turns black and if i push the upper left side a bit, the screen apears... very purple. I watched some tutorials about replacing the glass'. So i opend the galaxy s3 checked the ribboncables and after reasembling the screen won't start anymore. The softkeys doesn't apears. The phone is booting and make sounds. That means, power is there but no power for the display. I only want to now if the display is okay or not, to buy a new glass. But now i have these power problem. Somebody know how i can fix it? Or do i need a new display with digitizer? It's not cheap... a glass is much ceaper .
Zebra1234 said:
Hi there,
my girlfriend smashed her Galaxy S3 sometimes. Now it's done, the glass is broken in the upper left corner. The screen worked fine. A few days later she dropped it and dropped it again... i think she needs some wooden sticks to make a bushfire to call her friends. After some drops the screen stopped working fine. The screen turns black and if i push the upper left side a bit, the screen apears... very purple. I watched some tutorials about replacing the glass'. So i opend the galaxy s3 checked the ribboncables and after reasembling the screen won't start anymore. The softkeys doesn't apears. The phone is booting and make sounds. That means, power is there but no power for the display. I only want to now if the display is okay or not, to buy a new glass. But now i have these power problem. Somebody know how i can fix it? Or do i need a new display with digitizer? It's not cheap... a glass is much ceaper .
Click to expand...
Click to collapse
Multiple posts on the subject including a you tube video on replacing .You need to search them and decide .
Accessories may have more information .
jje
Not sure how that happened...
Thanks in advance for looking.
Ordered a screen replacement for my wife's busted S3 screen. Got it, followed directions....got the area around the headphone jack a little too warm, but continued and finished removing the screen. Once I had the screen off, I thought it would be a good idea to power it up to make sure everything was working, especially the top left corner of the screen that was closest to the over heated spot.
To my skeptical surprise everything was cool. Took a picture, looked at some higher res pictures....just to make sure everything seemed normal, to which it did. Powered down, removed the battery and the SIM card and continued on.
I cleaned the screen with alcohol as the directions stated, put everything back together..and NOTHING. The thing is bricked. Any ideas how? I wasn't doing anything remotely related/close to the ROM. The only difficulty I had with any part of this (aside from the aforementioned over heating) was with the two ribbon buttons at the bottom, which got slightly tangled in the tape.
Before I attempt to 'unbrick' this does anyone have any other ideas? Battery is good, phone has been plugged/unplugged while attempting to power up....I didn't take anything else apart so I can't think of anything else that would have goofed up this phone.
If your LCD was broken a new bit of glass wouldn't fix it. It's almost impossible to change just the glass without damaging the digitizer. Most alcohol will destroy an LCD so cleaning it with that is a terrible idea. If you plug your phone into a computer see if it connects, that will at least tell you that the phone is still working, just broken display.
DrFredPhD said:
If your LCD was broken a new bit of glass wouldn't fix it. It's almost impossible to change just the glass without damaging the digitizer. Most alcohol will destroy an LCD so cleaning it with that is a terrible idea. If you plug your phone into a computer see if it connects, that will at least tell you that the phone is still working, just broken display.
Click to expand...
Click to collapse
Awesome. Per the instructions: "clean screen with Isopropyl alcohol to remove any excess glue"
Plugged in or otherwise, I get no LEDs, vibrations....nothing. Wondering if a jtag would even be worth it?

[Q] screen problem...but which part needs replacing?

I have a screen problem, and because of the cost would prefer to perform the repair myself. (I've repaired a number of laptops and smartphones in the past.) My problem is that I don't know which part failed.
The accident: I dropped my Galaxy S3 from a height of about 3 feet onto concrete. For reasons too embarrassing to detail, I didn't have the protective case on the phone.
The result: The front bezel around the screen has a 5mm abrasion scratch in it, but the screen itself shows no sign of damage at all. When I put the battery back in, and powered up the phone, the screen did not come on. I see a faint line of green pixels about 3cm long on one spot on the screen. There is nothing else on the display. The phone seems to be powering up and down (not entirely certain because I had the phone on silent mode before I dropped it).
I'm hoping that one of you with more experience might have an opinion on any fixes I might attempt, or tests I might run to determine what needs to be replaced.
Thank you very much for your suggestions!

[Q] S-pen not working at all after bezel replacement

Hey guys, first time poster but long time reader here. I'm having a problem with my galaxy note 2, my s-pen is not working at all, and using a different spen does not solve the problem. Here's what I did, I had to replace the bezel because i dropped it and it was badly damaged, and prior to that it was working just fine. I took the battery, sd card, sim card and the spen out and then removed and replaced the bezel as carefully as possible, I then replaced all of them and turned on the phone as normal. I did not tamper with the screen itself in any way.
Well, immediately after turning the phone on, I noticed the spen is not working at all. The only response I get from it is when I take it out of the holster and the phone makes a noise and vibrates. I am on a custom rom (alliance), and have switched to another rom just to make sure that it isn't the rom's fault.
I have no idea what to do now, I'm really hoping you guys can help me out. It is still under warranty, so should I just return it to stock and take it to verizon? For anyone with experience, if I do end up taking it to verizon, will they swap out the phone with a new one on the spot or will they send me one of their "pre-owned" devices instead? Thanks for the help.
I took the bezel off to see if anything looked out of the ordinary, and I actually found the problem! In my own stupidity, I let a connector come loose when I was swapping bezels. If you're looking at it from the back of the phone, it is in the top left corner, next to the camera, it's a gold rectangular connector, apparently it goes to the wacom digitizer. I'll see if I can find a picture of it later to post.
So bottom line, if you are having to replace the bezel like I did, make sure to check your connections before putting the screws in, because that connector is easy to knock loose.
Thanks anyway guys, I'm very sorry for wasting your time, but I hope this will help someone else in the same position.
the same problem
i have the same problem. i has replaced the screen and the s-pen do not work any more. can you post a picture showing this connector? because the screen spare part that i buy has only one connector. thanks.

[Q] HTC One Screen Repacement.

I ordered a screen/digitizer assembly to replace mine because its cracked. I didn't want to disbond the digitizer so I ordered the whole assembly.
When I installed the new. assembly, the screen wont come on and the phone wont boot. Here is where thing started to get interesting:
1. Boot the phone with the old screen assembly and wait until the home screen shows then turn off screen.
2. Disconnect the old screen at this moment and connect the new one while the phone in sleep mode.
3. push power button to wake screen and its working and fully functional.(New one)
If I tried to reboot the phone the new screen wont come back on again. I also tried to reset and RUU and it still wont work.
Please let me know if you have any suggestions. I am in the process of returning the screen and getting another one, but i am still worried if I will be going through the same issue. One thing I didn't like about the phone is the cheap trashy components. So easy to brake and not made to be worked on.
I think I found the problem.
Well. Taking a closer look at the ribbon cable for the LCD and it appears to be the same color, but if you follow the lines, it does not look the same. I am currently waiting on a screen from a different seller and hoping to be the right one. I will keep you updated as I go forward.
Too many views, but no comment. I just hope this post going to help someone in the future. Keep in mind that sellers doesn't specified the kind of the LCD which is creating the troubles.
I am going to attach some photos to make it little clear. Keep in mind that I have HTC One for AT&T USA.
Did you ever replace the screen? I need to take mine apart and put a new battery and USB port in it. I'd like to know how pulling the screen went for you, if it was done.
xartic12 said:
Did you ever replace the screen? I need to take mine apart and put a new battery and USB port in it. I'd like to know how pulling the screen went for you, if it was done.
Click to expand...
Click to collapse
Not that good. I watched a YouTube video that helps a Little. You have to be really careful. Watch it and let me know if you need any additional help. Removing a broken screen not that bad since its broken. Be really careful when you order your new screen because I am having trouble to fine the right one. Mine PN: 60H00741-00P . There are many PN: 60H00742-02M that aren't working for me.
Forgot the video links
To disassemble : http://www.youtube.com/watch?v=qZFAsgjCunc
To reassemble: http://www.youtube.com/watch?v=S5KNmDeJ4Ww
medoo313 said:
Not that good. I watched a YouTube video that helps a Little. You have to be really careful. Watch it and let me know if you need any additional help. Removing a broken screen not that bad since its broken. Be really careful when you order your new screen because I am having trouble to fine the right one. Mine PN: 60H00741-00P . There are many PN: 60H00742-02M that aren't working for me.
Click to expand...
Click to collapse
The problem I have isn't the screen, but rather the battery and the USB port.. I have found both for about $20 each, but just didn't want to trash a basically brand new HTC.
Did you use a suction cup or pry it out?
xartic12 said:
The problem I have isn't the screen, but rather the battery and the USB port.. I have found both for about $20 each, but just didn't want to trash a basically brand new HTC.
Did you use a suction cup or pry it out?
Click to expand...
Click to collapse
I used a plastic sharp tool and you need to find the spots where you have to press on it to get it released. If you look at the first video, you will see where he marked it. those are the lock tabs that hold the assembly. The worst could happen is you may put a few dents in the plastic frame. You can order this part for around $20. A suction cup may works for you as well. Consider giving it little heat to lose the adhesive. Let me know if you still have any further questions.
Good luck
Where to get the right LCD in USA
I finally found a good supplier in USA for the proper kind of LCD. I spoke to him on the phone and I sent some pictures of my LCD. He has LCD part number 60H00741-00P that I been looking for. The website is https://www.gounlock.com/ If you ever call, ask for Jacky.

Mi Mix 3 replacement screen frame only

Hi all,
I broke my screen and ordered a new one (without frame). Replacing it was easy (after waiting for it for more than a month... thanks COVID-19), except that I was dumb enough to miss it was using a ZIF connector, and forced-push the cable in (shame on me).
It broke some pins, at first I didn't even notice but when looking at some stuff I took a picture off, it clearly appeared some colors were... unusual (pink instead of green ). So I double checked and indeed, pins had been damaged.
Anyway, to my question: do you know by any chance where I could find a screen frame (which comes with the fcc cable the zif connector is soldered on)? I only found frames with the screen attached and of course I don't need another new screen...
I checked ebay, but the ones I found don't look at all like the original.
I'd also be interested by the cable alone, but it would be way harder to put back in place I guess (as it's also holding front sensors).
If someone has a dead Mi Mix 3, it could also be helpful...
Thanks!
EDIT: nevermind, Amaan at Cellspare.com did an awesome job finding the flex cable and adding it to their listing when I asked him for help! Everything's getting better now

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