MTP symbol when not connected to PC - Galaxy S II Q&A, Help & Troubleshooting

Hi All,
Today when I unpluged my phone from charger I have noticed that I got USB symbol in notification bar, after checking what it is it turned out to be MTP connection but phone was not connected to anything. Next I took the battery out to reboot it and then I got empty battery sign with thermometer warning next to it!?! After few minutes phone booted in safe mode so I took the battery out again but this time for about 10 minutes. It is working fine since but Im worried that there might be something wrong with it. What do you think guys? Have someone had something like that?

Hey,
I had exactly the same thing happen today, tried everything I could think of, factory resets, formatting, cache wiping, tried reflashing multiple times with root and without root, XXKG2, XXKG1, KE7 and back to branded stock firmware. I also used a counter reset jig just in case that had any effect. Anyway, I ended up calling my provider and they suggested it was a hardware fault rather than software or settings and they are sending me a new one tomorrow.
I could only find one thread about a similar issue relating to the Galaxy S though I can't "refind" it, but basically there were a number of posters there with very similar issues and some of them had success cleaning the connectors in the port of the phone. I didn't really fancy trying this and breaking the connector or voiding my warranty and so I went with the easy option.
Hope that helps and hope you get it sorted easily!
Mark

Hi .. I have experienced more or less the same issue: mine was unplaged from charger and switched in "Driving Mode" showing a steering wheel in notification area. That happened many times so I just rebooted the phone and I got the empty battery sign with thermometer warning next to it me too!
Now usb connection is not working anymore I'm still able to charge the phone even flash is working using Odin, but no data connection is detected by any pc with any usb cable!
I've flashed the stock rom and tryed many cooked rom, but usb data is dead!
I think I have to return it on a service center!
Hope that is not your case!
Bye

Looks like it's not a one off then...one thing I would add, just in case anyone hasn't noticed, is that you can still use the phone as by plugging it in to charge then it does boot up properly. In addition, you can also still get into recovery and download via the Home+Volume key+power button methods so you can revert to stock rom etc. It's a bit fiddly to do this though as the phone seems to think its on charge and so you have to time the holding/pressing just right to beat the green battery and temperature warning sign...but at least we can do backups of all our data/apps.
I really do think it might be fixable with a bit of a pointy cleaning tool and maybe some isopropanol...but as I said I didn't want the risk of breaking something further. Worth a try if your carrier isn't very good at replacing things though!

Related

[Q] Help! Strange charging behaviour.

Has anyone had this problem?
After three trouble free months, my phone has developed a a very strange problem.
After charging, it behaves as if I'm constantly connecting and disconnecting the phone to a PC. It bleeps whilst showing the battery being connected to a charger and then imidiatly acts like its been disconnected by bleeping and running media scanner on both SD cards. It also shows that its connected via Kies, even though all this is happening whilst only being connected to a charger!
I've already done a full reset, which helped for a few days before it came back. It normally sorts itself out after a few minutes but the period before it "calms down" is getting longer. This morning I removed the battery for an hour but it continued in its "loop". Another, possibly related symptom is that as soon as the battery is installed, the phone boots up without being switched on. The same thing happens if I shut the phone down, it just powers up again!
Any thoughts?
had you if ever dip the bottom part of your phone? sounds like short-circuit issue or I maybe wrong.. try bringing in on to the nearest service center for warranty
Sounds a plausible theory but as far as I can tell, it hasn't got wet. Its been doing it for a few day now, so I think if it was damp, it would have dried out by now.
Thanks anyway.
I got the same problem. Let me know if you figure it out.
Sent from my GT-I9100 using xda premium
my friend had a simmilar issue and it was damage to the usb port , it kept thinking it was connecting to the pc or charger , it also wouldnt charge when plugged into a wall point and went into usb mode and vice versa when he put it into a pc
he sent it back for repair and they sent him a new phone
it may not be what you have but it does sound simmilar
i would try a few things like a reset , format the mass memory , install firmware again , dont restore back ups but set phone up fresh like you would do if you just bought it , then see how it goes , it could just be a corrupted file or system error that could be fixed bya full wipe and fresh install or it could be like my friends and the usb could be on the way out
on the topic of usb ports i do think they could have been better designed and iam hoping mine doesnt break as its needed for hdmi out , charging , docks , etc etc
Thanks Buxz,
As a follow up, I put the battery back in after taking it our for about 3hrs and all seams fine. I know that it isn't a permanent fix but I think it points more to software than hardware, which in a way is more annoying as its all about trial and error, as you described. A mechanical fault is more straight forward.
I just dread having to charge it again!
Regards, Woolly.
UPDATE
Charged it overnight and no problems when disconnecting it this morning. So far!
If anything, the battery life it better than before the problems. The fact that removing the battery for 3hrs broke the cycle of connect/disconnect, makes me think its soft/firmware related.
Woolly.

Battery/USB jack issue

I am not sure of what the issue is exactly....my computer doesn't recognize the phone when connected through USB saying device has malfunctioned...when i disconnect the charger or usb cable..the charging icon still shows the phone as charging...settings-->battery the status on top continuously changes every second or so showing charging/discharging...sometimes the screen comes on and off because the phone thinks it is being connected and disconnected from the charger...betterbatterystats tries to get root access every few seconds again because of the above stated reason...
....this started as an occasional issue but now it happens more often...i have tried changing roms, kernels, cables and batteries...tried connecting to different computers and reinstalled usb drivers...I have searched around and haven't found a clear cut answer...some say clean the jack and some say stick a screw driver in the jack which i am not going to do
All I want is for the phone to last till june or send it back to samsung for repairs...coming from roms in my signature i have now installed the stock firmware through recovery and reset the yellow triangle + counter....but the phone still has cwm recovery and cfroot kernel with of course rooting...i was wondering if someone can help me fix the issues or suggest a way to completely revert the phone back to stock (rom+kernel) so that i can send it back for warranty repair...
sorry for the long post...help is much appreciated..
Edit: Also, after disconnecting the charger, every minute or so I get a message saying Charging stopped because of over voltage..as long as the battery is in the phone it doesn't stay shut...when i turn it off, it automatically comes back on
Front camera FCs even on stock ICS rom
You know you are allowed to search. But anyway I'm not expert but sounds like malfunction of usb chip
Sent from my sgs2 running cm9
and like i said i did search..

Charging suspended. Voltage too high

Hi!
I know that are simillar threads about this, but none of them have the answer to my problem. I read them all.
As many others, my Galaxy S 2 started to give that error after the upgrade to ICS (in my case, I did it because my phone sent me the "alert" directly, not because I tried to upgrade it through Odin or similar).
My problem now is that the phone is not even detected by my computer in Download Mode, If I remove the battery for 10 minutes and add it again, it does show like if the battery ran out of charge and does not start, if I plug it to the wall charger then show as charging and then can start it, but the "charging suspended voltage too high" message show every 20 seconds.
I tried to clean the usb with a toothbrush, tried also with the "knife method" but nothing of that helps. I would like to even downgrade the OS to a 3.x version, but can't make the computer recognize the phone in Download Mode. Any help would be appreciated.
I drove myself mad chasing this one a couple of weeks ago, it does indeed seem to be a problem with the connection between the USB plug and the phones mainboard.
I did find a post by a Samsung engineer in which he claimed it was a common problem and that he was seeing 3 or 4 a day.
I was lucky in that mine was solved by gently pushing the male internal connector gently forwards (upwards if the phone is on its back)
If you think logically, a usb/mainboard connection problem does make sense, in as much as there are so many differing symptoms and the claimed successes by cleaning, I would guess in these instances, the cleaning has in fact, simply moved the connector back into position.
This is a pretty poor show for Sammy, there seem to be more and more S2's failing in this way as time goes on, my own phone has only ever been charged in the Samsung dock, and still fell foul of it!
I would give repositioning the connector another try, pull the battery and use a wooden toothpick or similar, I used a fruit knife, but wouldn't recommend it. If you cant get it back in shape, I'm afraid you will have to send it back to Samsung
R
JorgeC said:
Hi!
I know that are simillar threads about this, but none of them have the answer to my problem. I read them all.
As many others, my Galaxy S 2 started to give that error after the upgrade to ICS (in my case, I did it because my phone sent me the "alert" directly, not because I tried to upgrade it through Odin or similar).
My problem now is that the phone is not even detected by my computer in Download Mode, If I remove the battery for 10 minutes and add it again, it does show like if the battery ran out of charge and does not start, if I plug it to the wall charger then show as charging and then can start it, but the "charging suspended voltage too high" message show every 20 seconds.
I tried to clean the usb with a toothbrush, tried also with the "knife method" but nothing of that helps. I would like to even downgrade the OS to a 3.x version, but can't make the computer recognize the phone in Download Mode. Any help would be appreciated.
Click to expand...
Click to collapse
1. if you have warranty and not used odin, better take it to the samsung service center.
or
2. try to get a full charge battery from your friend and finish your job in dwnl mode using odin
or
3. try usb jig method to reset and start your mobile in recovery/dwnl mode.. you can search the forum on this and there are lots of posts reg this.
explains the randomness
If the connector moves its presumably broken connection with motherboard. Wonder if a teeny drop of superglue.....
Its odd how its become a feature after ICS but I suppose if its an age/ wear and tear thing that works too. Mine is drvibg me nuts too
Not solved with Stock ROM
Im also having the same problem . Not able to fix it. But if u want to connect to PC , just connect ur phone to PC and restart the phone. Then the drivers will installed and it will detected . Now u can flash it using ODIN . I tried updaing through the Kies with latest version of ICS patch , now the warning mesasge is not coming , but the battery icon blinks every second and if i check the status it shows NOT CHARGING instead of DISCHARGING

[Q] Samsung S2 stuck in boot loop, cannot access Recovery Mode.

Hey Guys, ive scoured google for 2 days now trying to find a way to fix my phone.
two days ago i was doing some work and i left my phone on the table, and later i found out that the battery was low and it had shut off. But when i looked at it, it was just flashing the "samsung galaxy s2 gt-i9100" text logo. (and not the animation circle logo.)
I tried turning it off, didnt work so i thought it had frozen which happens, so i took out the battery and put it back in again.
Then i tried to plug it into my recharger, and it was showing a grey battery icon and was frozen on that screen always, the screen doesnt turn off, the battery icon isn't showing that its charging. doesnt change, just shows the same empty battery grey icon with the refresh circle-arrow in the middle.
I tried taking the battery out leaving it out for 5 minutes, draining the battery from the phone by holding the power button for 10 seconds, then trying to charge the phone. Same issue, only showing the grey battery icon when trying to charge and it never changes or goes away.
SO i tried to boot up the phone, but it wont go past the samsung text logo.
I tried entering recovery, but it just freezes on the samsung text logo.
I can enter Odin download mode, and ive tried installing several different both stock, original and CMW roms, and nothing changes. (except if i use gingerbread, then the grey battery icon just keeps flashing off and on in 5 second intervals when plugged into the charger.)
Ive tried taking the battery out for 8 hours and try booting it, no change.
Ive tried changing the battery, no change (think it has low bat as well maybe).
Ive tried leaving it plugged in overnight, but that only drained whatever power i had left over in one of the batteries.
Ive tried some of the siyah and doriman kernels, and they add a loading bar which gets full on the samsung text screen,
but then freezes after that.
Im losing my mind here, ive tried almost everything i can think of. And would really appreciate any help on this.
UPDATE
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ok so to keep this post updated for people experiencing the same issues.
IT seems there is a hardware failure in progress.
BUT i managed to get a temporary fix, it seems that by having the ear plugs connected into the earphone jack in the phone, the phone becomes somewhat usable. I was able to get into recovery, and able to flash a new stock, and its up and running, but as i said this is only a temporary solution as the real issue is that the phone is not conducting the electricity in a proper way that allowed me to recharge my batteries until i had added the earphones...
The phone becomes unusable for me when i remove the earphones again, as i believe its failing to conduct the electricity from the battery properly through the motherboard without something connected into the earphone jack..
SO for people having issues with their phones, it might be a possible way to get your phone temporarily operational again.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Search for Hopper8's 'Odin troubleshooting' thread, download the 3 part stock firmware linked in the thread, flash it with Odin (only if you absolutely have an I9100/I9100T though).
Edit - Doesn't sound promising though, cross your fingers doing that works.
yeah i tried hoppers guide, didnt help me.
Still stuck on the samsung screen.
Whats wierd is, if ive got the phone on charging, it wont boot to the samsung screen even, it just turns itself off
and returns to the grey battery icon again.
Hang on....Did you try flashing the 3 part firmware like I mentioned ? If you haven't, do it. If you have, it's a service centre/local mobile repair shop job.
MistahBungle said:
Hang on....Did you try flashing the 3 part firmware like I mentioned ? If you haven't, do it. If you have, it's a service centre/local mobile repair shop job.
Click to expand...
Click to collapse
Yeah, tried 3 part, even another packages with pit files bootloader and repartitioning from another guide.
still no change, still freezes at samsung text screen.
I dont want to take it to a service center, as there is none around here as far as i know. Norway.
If i can just get it into recovery mode i can prob fix it, but i cant fracking enter recovery. Its driving me insane.
Given what you've tried, no chance of fixing it yourself by the usual methods.
Either take it to a local mobile repair shop & ask them to source a 2nd hand motherboard for you & put it in, or you source one (from a 'donor' phone; a phone with a broken screen that is otherwise OK for example, search online) & either replace it yourself or pay the local mobile repair shop to do it if you're not confident enough.
have you ever flashed a rom on that before..... or is this a stock ROM phone we are talking about???
if it was a stock ROM phone....then did it receive updates over carrier network and started to install itself???
if yes then you should have not stopped it...... i have some problem with phone 3 days ago.... i downloaded latest XWMS1 released for nordic region....... phone is fixed and i am back to neatrom 5.3.1
i suggest you download XWMS1 ...and try flashing it via Odin..... might start......
keep fingers crossed
Roshan707 said:
have you ever flashed a rom on that before..... or is this a stock ROM phone we are talking about???
if it was a stock ROM phone....then did it receive updates over carrier network and started to install itself???
if yes then you should have not stopped it...... i have some problem with phone 3 days ago.... i downloaded latest XWMS1 released for nordic region....... phone is fixed and i am back to neatrom 5.3.1
i suggest you download XWMS1 ...and try flashing it via Odin..... might start......
keep fingers crossed
Click to expand...
Click to collapse
It wasn't any update or anything, it was related to the battery i think as the batt was low.
And instead of recharging the battery, it went into bootloop and started draining the battery more when it was plugged into the charger.
ive downloaded xwms1, still stuck in bootloop.
Ive even opened it up to see if it was a hardware issue, i see no flaws, all buttons work and nothing is stuck.
the phone just keeps going to the samsung logo, and wont go into recovery mode.
It can easily go into download mode, but recovery mode is just not happening.
at this point i just ordered the Xperia Z1 instead, but i still want to fix this phone and give it to my dad or something.
desidarko said:
Hey Guys, ive scoured google for 2 days now trying to find a way to fix my phone.
two days ago i was doing some work and i left my phone on the table, and later i found out that the battery was low and it had shut off. But when i looked at it, it was just flashing the "samsung galaxy s2 gt-i9100" text logo. (and not the animation circle logo.)
I tried turning it off, didnt work so i thought it had frozen which happens, so i took out the battery and put it back in again.
Then i tried to plug it into my recharger, and it was showing a grey battery icon and was frozen on that screen always, the screen doesnt turn off, the battery icon isn't showing that its charging. doesnt change, just shows the same empty battery grey icon with the refresh circle-arrow in the middle.
I tried taking the battery out leaving it out for 5 minutes, draining the battery from the phone by holding the power button for 10 seconds, then trying to charge the phone. Same issue, only showing the grey battery icon when trying to charge and it never changes or goes away.
SO i tried to boot up the phone, but it wont go past the samsung text logo.
I tried entering recovery, but it just freezes on the samsung text logo.
I can enter Odin download mode, and ive tried installing several different both stock, original and CMW roms, and nothing changes. (except if i use gingerbread, then the grey battery icon just keeps flashing off and on in 5 second intervals when plugged into the charger.)
Ive tried taking the battery out for 8 hours and try booting it, no change.
Ive tried changing the battery, no change (think it has low bat as well maybe).
Ive tried leaving it plugged in overnight, but that only drained whatever power i had left over in one of the batteries.
Ive tried some of the siyah and doriman kernels, and they add a loading bar which gets full on the samsung text screen,
but then freezes after that.
Im losing my mind here, ive tried almost everything i can think of. And would really appreciate any help on this.
Click to expand...
Click to collapse
errrrm - just a thought (and it's a real long shot) I had some strange battery drain (bootloop) issues with a brand new i9100 and it turned out that the micro sd card I was using was corrupt, took it out and it worked. Might be worth a try but like I said its a long shot. If that does not work I agree with mistahbungle and looks like you wil need to replace the mb.
Jimsilver73 said:
errrrm - just a thought (and it's a real long shot) I had some strange battery drain (bootloop) issues with a brand new i9100 and it turned out that the micro sd card I was using was corrupt, took it out and it worked. Might be worth a try but like I said its a long shot. If that does not work I agree with mistahbungle and looks like you wil need to replace the mb.
Click to expand...
Click to collapse
Yeah ive already taken out the micro sd card and sim card, didnt change anything.
Just so weird the phone is less than 2 years old. Sucks that its already llike this.
desidarko said:
Yeah ive already taken out the micro sd card and sim card, didnt change anything.
Just so weird the phone is less than 2 years old. Sucks that its already llike this.
Click to expand...
Click to collapse
I've went through this on my Hercules, T-Mobile S2. I had Android tweaker pro, removed all of the tweaks, and rebooted. It took me quite a while but I was able to get into recovery by the normal button mashing.
DO NOT HAVE THE PHONE PLUGGED INTO THE CHARGER.
PRESS THE VOLUME BUTTONS THEN THE POWER BUTTON WHILE STILL HOLDING THE VOLUME BUTTONS.
AS SOON AS YOU FEEL THE FIRST VIBRATION, LET GO OF ONLY THE POWER BUTTON!
CONTINUE TO HOLD THE VOLUME BUTTONS UNTIL YOUR RECOVERY LOADS.
THAT IS WHAT HAS WORKED FOR ME.
Sent from my Skinny Hercules
Ok so to keep this post updated for people experiencing the same issues.
IT seems there is a hardware failure in progress.
BUT i managed to get a temporary fix, it seems that by having the ear plugs connected into the earphone jack in the phone, the phone becomes somewhat usable. I was able to get into recovery, and able to flash a new stock, and its up and running, but as i said this is only a temporary solution as the real issue is that the phone is not conducting the electricity in a proper way that allowed me to recharge my batteries until i had added the earphones...
The phone becomes unusable for me when i remove the earphones again, as i believe its failing to conduct the electricity from the battery properly through the motherboard without something connected into the earphone jack..
SO for people having issues with their phones, it might be a possible way to get your phone temporarily operational again.
Please Help !!
i kinda cloned my ROM , it happened by mistake while trying to flash my kernel , now that my phone is stuck in samsung start up logo , . tried to reboot still the same result. . . :crying:
No recovery ? If that's the case, stock rom from Samfirmware, flash with Odin to get a 'clean slate' (How ? Thread stickied near top of Q&A has instructions) & re-try whatever it was you wanted to do. If you do have recovery, try a factory reset in the first instance, if that doesn't work or if you have recovery but can't do one for whatever reason, proceed with the stock flash via Odin.
Thanks
thanks a lot mate , my fone back in action. successfully flashed, now running on JB 4.3.1 on Paranoidandroid 3.99-RC2 , so far so good .:victory:
being a newbei in this field hoping for all the support
EDIT : any suggestion how to remove warning symbol (yellow triangle) while booting .
Possibly triangle away.Search to get the free version.
desidarko said:
Ok so to keep this post updated for people experiencing the same issues.
IT seems there is a hardware failure in progress.
BUT i managed to get a temporary fix, it seems that by having the ear plugs connected into the earphone jack in the phone, the phone becomes somewhat usable. I was able to get into recovery, and able to flash a new stock, and its up and running, but as i said this is only a temporary solution as the real issue is that the phone is not conducting the electricity in a proper way that allowed me to recharge my batteries until i had added the earphones...
The phone becomes unusable for me when i remove the earphones again, as i believe its failing to conduct the electricity from the battery properly through the motherboard without something connected into the earphone jack..
SO for people having issues with their phones, it might be a possible way to get your phone temporarily operational again.
Click to expand...
Click to collapse
Okay so I have managed to get it to this point after day's of grief, now please tell me I don't have to walk around with the earplugs in for ever !
RustyNail99 said:
Okay so I have managed to get it to this point after day's of grief, now please tell me I don't have to walk around with the earplugs in for ever !
Click to expand...
Click to collapse
A friend of mine had am Android phone that had a similar problem. It always showed the headphones on the status bar and Could not be heard. If you will take your phone apart then you can look for bridges in the solder points. These happen from poor construction and over heating. Fix the bridges and you should be good to go.
Sent from my Skinny Hercules
fathertomany said:
A friend of mine had am Android phone that had a similar problem. It always showed the headphones on the status bar and Could not be heard. If you will take your phone apart then you can look for bridges in the solder points. These happen from poor construction and over heating. Fix the bridges and you should be good to go.
Sent from my Skinny Hercules
Click to expand...
Click to collapse
I did take it apart and had a quick look, all seems ok. However I was not ready to junk the phone so I improvised a little, its not pretty but it works.
I had an old headphone jack which I cut down so as it would just fit into the jack point, installed Soundabout Pro app which forces the calls to come out the earpiece and not headphones voila it works. In the end it cost me a lot of time surfing countless forums, anger management control and some joy at getting it to work. Still without the help people give on this and other forums it would be a useless phone :fingers-crossed:
sweetben747 said:
thanks a lot mate , my fone back in action. successfully flashed, now running on JB 4.3.1 on Paranoidandroid 3.99-RC2 , so far so good .:victory:
being a newbei in this field hoping for all the support
EDIT : any suggestion how to remove warning symbol (yellow triangle) while booting .
Click to expand...
Click to collapse
i was also searching for the same...... since triangle did not hurt but i wanted to know if i could get rid of it......
thanks to our wonderful Dev name Phliz i could do it... i had to reflash to stock for it ofcourse but then whole effort was worthwhile .....
http://forum.xda-developers.com/showthread.php?t=1877270
this is the link.... please go through... and best of luck to remove the triangle.....

[Q] SGS2 sudden boot problems

My phone wouldn't power on so I got it repaired at a phone repairs shop. The guy there thought there was a software error because he saw the error triangle on bootup. He was mucking around with it in download mode when I got there, I said not to worry about it, paid for the repairs and left.
The phone will not boot, and will not go into recovery or download modes with the respective key combinations
UNLESS
I have it plugged into a power source, in which case I can enter download/recovery mode, but when I try to boot the phone I just get the empty battery picture with the loading circle appearing periodically.
--- Possible solution: bad battery
I have flashed CWM onto the phone using odin in download mode and have flashed .zip roms that were previously working before this debacle, but again the phone won't boot onto the newly installed rom.
I have tried flashing the correct stock rom using odin but the phone won't boot this way either.
When I take the battery out and connect the phone to a power source it is non-responsive.
Apart from a batter problem (which I will be able to test tomorrow), what could be the cause of this problem, and how might I be able to fix it?
Sounds like a JTAG (but don't get your hopes up) or a motherboard replacement job (more likely) to me. If the phone won't boot at all/shows no signs of life, something is majorly wrong. As to what that is, nobody here could tell you that with certainty because we don't have the phone in front of us, but if it's not booting at all either the NAND is buggered or something else on the MB has crapped itself.
Cross your fingers it's just a simple battery issue, but it doesn't sound like it.
MistahBungle said:
If the phone won't boot at all/shows no signs of life
Click to expand...
Click to collapse
What does being able to access recovery mode/download mode contribute to this? The phone works to a degree, it seems, it just won't boot to an OS.
How might I go about troubleshooting the hardware?
(Might as well use this as a learning experience)
Right. Sorry. Just re-read your OP. Still sounds like the NAND is stuffed, which explains why you've tried flashing flashing stock/CWM & phone still won't boot normally. One thing you could try is search for Hopper8's 'Odin troubleshooting' thread, and flash the 3 part firmware linked in that thread. If the phone still won't boot normally after that, it's pretty much a certainty that you'll need to replace the MB at least, which leads to the next paragraph...
Also, if you find the 'booting when plugged into charger but not with battery' thing is still happening even with a new battery, that suggests whatever circuitry is responsible for taking zzz's from the battery & powering the device is (also) faulty/damaged. You could also try the obvious & clean the battery contacts with some isopropyl alcohol. The most common charging/power type problems we see here is the USB board/port dying. But if the phone is slightly functional whilst on charger, it probably isn't that, still might be worth replacing though given how quick/cheap/easy it is to do. There could be a short/whatever causing at least some of the problems, and it wouldn't be the first time a faulty USB board has caused that/manifested itself in less obvious ways than what we normally see (I.E causing the problems you're seeing rather than causing intermittent charging problems or phone rebooting randomly on its own or whatever).
In that case, try the service manuals for the device; these have been posted here before & can also be found with a Google search. They have detailed schematics/parts lists/walk throughs of the most common repairs w/pics, and might help if you want to have a go at fixing it yourself.
Thanks for the response.
I'm in the process of downloading the three part firmware to test later in the night.
Providing that fails, I'll look into part supplies and start researching how I can, if at all, repair this myself.
On the topic of faulty USB boards- I had my phone serviced a few months ago for just that, and it worked fine, but in the weeks leading up to this event my phone HAD been rebooting itself semi-regularly, although I put this down to a software issue rather than a hardware issue. I'll get my hands on the service manual for the I9100 and start reading up.
In the meantime I can just get a cheap burner Nokia that won't play up on me for the next 20 years.
Interesting. In that case, given the other alternatives are more expensive (assuming the 3 part firmware & new battery doesn't fix things), it may just be a case of another dodgy USB board & you might want to start there.
If you can't find the manuals anywhere, let me know & I'll see if I can dig them up from an external drive I have stashed away somewhere (don't have it handy now, but will dig it up tomorrow for you if necessary).
Yep, unlike current technology, old phones like that just seem to work no matter what you throw at them
The three part firmware flashing has moved things along slightly- after it finished the stock SGS2 boot screen appeared for a second or so and while leaving it on the charger it will cycle between showing the grey loading battery and an android with a loading bar underneath, which is progress from before. It is still unresponsive when disconnected from the power- I have procured the service manual and will look into disassembly/diagnostics when I have some small enough tools. I'll still try using a different battery when I can, but it probably isn't the issue.
Clean the battery contacts hard with a pin
Sent from my GT-I9100 using xda premium

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