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[Q] Samsung Galaxy S2 - Multiple Problems

I am using Samsung Galaxy S2 unrooted (bought in India). The phone behaved properly for 2 weeks and then started giving these issues.
1. Switching Off does not really switch-off the phone. A battery symbol comes similar to the one that comes if you are charging once the phone is switched-off. However, there is also an exclamation mark (more like a thermometer) which blinks. There is no charger or USB connected.
From the above state, you cannot switch - off / on the phone unless you plug in the power adapter / USB.
2. I have noticed that while that even when USB Charger is attached, the Battery Status (Menu-> Settings-> About Phone->Status) shows "Charging(AC)".
3. A related problem to the above may be the fact that "Samsung Kies" does not start when you plug in the USB cable with the computer. The phone does not even connect to the computer via USB mode (allowing USB debugging). I have re-installed Kies / USB connectivity drivers for my PC (Win XP) a couple of times and see no change in the behaviour.
4. When charging is removed, the battery health using Z-Device Test (3rd party software) shows "Over Voltage".
I am not sure if anybody else has seen similar problems. Appreciate any help.

I have exactly the same problem. I will go with my SGS2 at the warranty this week.

Me too having same problem... Guyzzz please help us...
please do reply..
Please give some solution to the problem..

Same freaking problem here...
the battery doesnt even charge full.. it goes up to 70% and shows its completely charged..
then it drains fast too..
someone please find a hardware or software DIY fix for it...

Same problem here... I can't believe this is happening after less than a month of buying it.

I've been reading through different forums and some people got it fixed by cleaning the usb port:
go to androidforums and paste this in the URL.
samsung-galaxy-s2-international/377331-spurious-battery-temperature-warning-2.html
xdadevelopers won't let me post url's since I'm still too much of a n00b.
Here is a quote from the forum if the link does not work:
Anybody still having difficulties with this and finding this thread, go down the clean-it-yourself route. Worked for me. You will need: some isopropyl alcohol (disk cleaner), wooden toothpicks, some compressed air.
First things, remove the battery, sd and sim card.
Soak the tips of a couple of toothpicks in the isopropyl. then use them to carefully scrape the top 'tongue' in the port, the bit nearest the screen. you'll notice the toothpick gets quite dirty. Do this a few times with fresh toothpicks (or cut ff the dirty bit with sharp scissors).
Once the toothpicks aren't getting dirty any more, gently ease the tongue up, towards the screen a little, don't force it too much.
Use the compressed air to give it a good blow and leave it to dry for a while.
Its solved my problems, Battery Monitor Widget recognises that the usb is unplugged properly and no more warning triangles or poor battery performance. The phone, also gained an extra 20% of battery out of it.
Click to expand...
Click to collapse
Credit goes to user andycorps from androidforums.
I hope this helps someone else, mine is still not working.

Update:
I've been constantly cleaning the USB port very carefully. Behavior has changed in several ways. The port is still acting crazy, sometimes if I turn it off, the phone will boot up by itself, BUT...
I had it recognized by my laptop a couple of minutes ago and able to move files from and into it. Just as if everything was fine.
It came down again because of the crazy behavior of the port.
I would undoubtedly say that this is a hardware issue. I'll go buy some pressured air today to blow the port and make sure it's clean and dry.

Had the exact same issue
In Addition to battery drain, unexpected MTP app pop apps with USB connecting sound (that could go on and on for minutes). and not being able to connect USB mass storage (PC complains on device malfunction...)
After reading quite a lot forums I found out that this is a well known issue (at least for the users). I called samsung they didn't want to take any liability for the issue, and even worse they said my device is non-US device, thus I can't get support even if I wanted to pay for it.
I figured it is a HW issue, and did a little study on what replacement part are being sold on the market, short analysis showed display (well that is true for most devices, cause we tend to break them, ain't we?) and USB PCB. the latest matched my suspicion on USB HW defect. I bought the PCB for 7$ replaced it and tadam: that fixed my phone.
Samsung should check themselves, people pay 600$ for the device, if there is a manufacturing issue, they should recall and fix, just like big companies do, just like Intel did with Pentium and just like Toyota did with braking systems. nevertheless they should find an arrangement to give their customers service anytime everywhere! or better make their products not requiring service

and the problem is...
i have the exact same issue, and when i contacted samsung about it not only they did not took any liability on this matter, but they said that the warranty was voided because they found sodium residue on the usb port at the bottom of the phone, and for those of you who do no know sodium = salt = sweat, so according to samsung i voided the warranty on my gs2 because my hands sweat. not only is this complete nonsense because it is an exposed micro usb port but because this will be in contact with sweaty hands when you are holding the phone in landscape mode, so after i did some research about this problem i found that the issue is not only that the usb port is exposed but that the usb flexor and the port that it connects to are very lo quality cooper(which should be gold plated) and can very easily have corrosion problems, so the solution is to clean the usb port if detected early, but if you have been having the issue for a long time like me you need to change the usb port, flexor and the port that the flexor connects aka "the usb chip", as well as the battery since having over voltage on a battery for an extended period of time can ruin it.

[Q] Need expert help, is it bricked/savable??

I have a TF101 that will not charge or power on. I rooted it a month ago and it was running great. My wife lost the charger and had plugged in the tablet USB cable to a cell-phone charger , I found plugged into a week later to the phone charger, unplugged and attempted to turn that tablet on, it flickered on for a moment and then died (loading screen) :silly: ya stupid right?. I them found the right charger and plugged in the tablet and the light indicating that it is charging does not come on. I look and looked online for help. I'm pretty sure its not a charging problem as I did the freezer trip on the charger box nothing, I bought a new charging cable and charger off Amazon, nothing. Still not coming on when plugged in or anything (That is why I don't think its just a battery issue from what I have read.) The connection on the tablet looks ok on the bottom and both the old and new charger will power up and charge the keyboard dock just fine. Has the tablet been bricked dead?? Nothing I can do??
Thanks for your help and reply on this your all awesome
P.S I also tried a slow charge through the usb port on my computer over night and left the tablet plugged into both chargers over the course of two different nights. No luck.Also can't get into (Apx mode) the volume up and power held down for 15 sec does nothing.

Looks like you're stuck. You'll have to make a decision whether to buy a new battery or not. A colleague of mine solved a similar issue with a new battery off ebay, but it doesn't mean there isn't another hardware issue.
When you say the charging light does not come on, you mean on the dock right? The tablet itself doesn't have one. Did you try to just charge the tablet without the dock? Did you try to open the dock and flip the switch?

Lethe6 said:
Looks like you're stuck. You'll have to make a decision whether to buy a new battery or not. A colleague of mine solved a similar issue with a new battery off ebay, but it doesn't mean there isn't another hardware issue.
When you say the charging light does not come on, you mean on the dock right? The tablet itself doesn't have one. Did you try to just charge the tablet without the dock? Did you try to open the dock and flip the switch?
Click to expand...
Click to collapse
Yes the charging light on the dock does come on I thought I saw what looked like a light on the tablet. So the dock is charging and working just fine.
A battery like this? (I would put the URL but its not letting me since I'm new.
I'm not super good would opening stuff up how hard would the battery be to replace? I did see a thread on opening the unit itself looked complex. Also Any more trouble shooting I should do? I may just buy a replacement off ebay and sale my old one. Also can you tell me if its bricked or not or whatnot? I just don't want to put out fifty bucks for a battery and not have it work

Well if it won't turn on, it's difficult to troubleshoot further. The general rule is: As long as you can get it in APX mode, it's not bricked; with hardware issues as the only exception. In theory, it should power on with an empty battery (and start the charging process), but I have no idea about a dead battery or how the unit is made to handle such cases. Give it some time I'm sure someone else here can answer that question from experience.
Replacing the tablet battery is not too hard, but it's a long task that requires patience and some tools. There's some videos on youtube and others about how to open the unit safely without damage, and decent tools are cheap assuming you don't have precision tools. By opening it you can troubleshoot it a little more. Inspect the battery for physical damage, like being oversized, which means it's likely dead. If it looks in good shape, try disconnecting and reconnecting it to the board; sometimes reseating a connector solves the issues. Also look for any obvious damage inside while you're there. Even if you don't know much about electronics, an obvious burn mark on the board is never a good sign.
If after all that it still won't power on, then yes you could check out ebay. Just make sure lots of people have bought the same from this buyer (the more the better) and they gave positive reviews for the product (stuff like "still works after a year"). Make sure it specifies it supports the tf101 and it should be fine.
Honestly from what you described in the original thread, I wouldn't be surprised if over-amp or something like that damaged the battery. Hopefully it's only the battery but as I explained, it's rather hard to troubleshoot. From personal experience developing boards like that, there are usually protections in the device to prevent damage in case of over/reverse voltage/amp. Depending where the battery is connected in the circuit sometimes it's protected sometimes it's not. I have no idea how Asus do it so take it with a grain of salt.
Can you provide said phone-charger specs? Volts/amps/exact model?
Edit: P.S. The device or dock will not charge through USB. You need the actual wall charger.

Lethe6 said:
Well if it won't turn on, it's difficult to troubleshoot further. The general rule is: As long as you can get it in APX mode, it's not bricked; with hardware issues as the only exception. In theory, it should power on with an empty battery (and start the charging process), but I have no idea about a dead battery or how the unit is made to handle such cases. Give it some time I'm sure someone else here can answer that question from experience.
Replacing the tablet battery is not too hard, but it's a long task that requires patience and some tools. There's some videos on youtube and others about how to open the unit safely without damage, and decent tools are cheap assuming you don't have precision tools. By opening it you can troubleshoot it a little more. Inspect the battery for physical damage, like being oversized, which means it's likely dead. If it looks in good shape, try disconnecting and reconnecting it to the board; sometimes reseating a connector solves the issues. Also look for any obvious damage inside while you're there. Even if you don't know much about electronics, an obvious burn mark on the board is never a good sign.
If after all that it still won't power on, then yes you could check out ebay. Just make sure lots of people have bought the same from this buyer (the more the better) and they gave positive reviews for the product (stuff like "still works after a year"). Make sure it specifies it supports the tf101 and it should be fine.
Honestly from what you described in the original thread, I wouldn't be surprised if over-amp or something like that damaged the battery. Hopefully it's only the battery but as I explained, it's rather hard to troubleshoot. From personal experience developing boards like that, there are usually protections in the device to prevent damage in case of over/reverse voltage/amp. Depending where the battery is connected in the circuit sometimes it's protected sometimes it's not. I have no idea how Asus do it so take it with a grain of salt.
Can you provide said phone-charger specs? Volts/amps/exact model?
Edit: P.S. The device or dock will not charge through USB. You need the actual wall charger.
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Click to collapse
The phone charger that it was plugged into was a Galaxy S charger. 5v===0.7A. Doesn't seem high enough to have done anything...but I'm definitely no expert. (Literally)
Sounds like its a good idea to open it up then to check on the battery, if burned or oversized then I will buy a new one (As long as I don't see burnt marks) If the battery looks fine I'll try the reconnect. And cross hy fingers. Thanks for all your help so far. Any advice on where to buy the tools? Deal Extreme good for that Amazon?

No tools are required, ands its easy to get into just be carefull pulling the bezel off as the tabs that hold it on are quite weak (i broke a couple when i ripped mine apart in anger lol) after that their is about 10 normal screws until its open. It could be the case that the battery just needs to be unplugged and re-plugged in.
Its a strange problem you have there, the power output from that charger is less than half of what the standard asus charger outputs, if something is fried id call concidence as ive plugged my tf101 into various ac-usb adaptors with no troubles. Its a complete guess at this point but its almost like your tablet is suffering from the 0% issue thats common in the docks, where it refuses to charge if completely drained (afaik with the dock this is fixed by disconnecting and reconnecting the battery)
Also did you get an official asus charger as a replacement? a few of the cheaper ones dont even output enough voltage to fast charge the tf101.

Battery drain after water damage and repair

So my nexus 5 took an unfortunate trip into the ocean with me a month back. It was fairly dead. I couldn't get it do much of anything, even after complete disassemble, a flush with distilled water, then alcohol, and an extended multi day drying time that started with 4 hours in direct sun, then 44 hours in a rice bag.
I was messing around with it the other day, and got it booting, but the touch screen was dead. I was able to use if fully with the help of an OTG cable, usb hub, keyboard and mouse. I decided since everything worked great, I would order a new screen and a new battery(since the battery was draining very fast).
So i ordered a completely front panel assembly, including bezel, touch screen and LCD and I ordered an OEM battery. I installed the parts carefully once they arrived, everything was working fantastic! Well..... almost. The battery drain was still there. I would loose 4%-8% in airplane mode, and had 0 wakelocks. So i disassembled again, cleaned all the boards again in warmed distilled water and a tooth brush, then flushed with alcohol, and put in rice for about 48 hours. I reassembled, did a complete format from fastboot and reloaded everything from a google factory image. The battery still drained 4%-8% per hour, even in airplane mode. I disassembled again, and disconnected everything besides the battery, the charge board and the LCD cable. Performed a factory reset, booted up and didn't log into anything or touch anything. Put the phone in airplane mode again, still draining 4-8% per hour, with NO screen on time and no wake locks.
I figure 4 things could be going on.
1.) Main board is fried
2.) Charge board is fried.
3.) The original OEM battery was draining fast because the LCD was water damaged, and this "OEM" battery is a really bad fake with extremely small capacity?
4.) This LCD is somehow causing a battery drain even with screen off because if a cheap fake?
Having said that, the LCD looks and works great, and the battery looks great, just like an OEM battery.
If anyone has any suggestions please let me know.

Better off replacing water damaged phones

He's right this time. Could be almost anything, especially after exposure to salt water.
Sent from my Nexus 5 using Tapatalk

Op did you buy the moto maxx?

@urushiol

dicecuber said:
Op did you buy the moto maxx?
Click to expand...
Click to collapse
I take it you saw my thread over at:
http://forum.xda-developers.com/dro...xt1225-umts-hsdpa-bands-t3106760#post60811984
Not yet, I am worried about that 900mhz band support and can't find a clear answer. It looks like it does work on 900mhz UMTS, but that its just not advertised in Brazil. I want to be sure though, its an expensive phone.

Wanted to add, i narrowed the nexus 5 issue down to a mainboard issue. I setup airdroid on the phone, powered off, disconnected there screen and charge cable, powered back on and accessed the phone via airdroid.
Still drained just as fast, so the issue must be mainboard or battery. And since it did it with the old battery, i assume its the main board. I would love to find one for cheap, but they seem scarce.
If anyone has a D820 main board, or knows where I can find one, let me know. I would pay 80 bucks. Would pay 50 dollars for one with a dead ESN number so long as everything else worked.

Black screen after getting hot while charging

Hello together,
I have a Z5 (6653) that didn't start anymore and got extremely hot while charging. To be more clear: after connecting the phone to the charger the red LED turned on, then after about 10 seconds later it turned off again. From this moment on the phone's back started to get extremely hot. The source of the heat is about 1cm right and 1 cm down to the back camera (so you can say 1cm diagonal from the camera to the phone middle). Because of this I doubt it has to do with the battery as it should heat the lower two-third and not the upper third of the phone. Maybe the processor is at this place?
I tried to connect the phone in flash mode with the PC and it connected, but disconnected after a few seconds, probably because battery was empty. I repeated this procedure (connecting to charger, disconnecting, reconnecting, connecting to PC) a few days and suddenly the red LED kept on and the phone didn't get hot anymore.
So I charged the phone fully and wanted to start it, but the screen won't turn on anymore. Connecting it to the PC and the Phone drive (MTP) is displayed but empty, because you need to unlock screen. Also I hear the connecting sound of the phone and touch feedback sounds.
I tried the following things:
Xperia Companion Repair
Flashtool flashing newest ROM
Flashtool downgrading to 32.0.A.6.152_R5B (LP ROM)
Nothing helped. Well, the idea it is an hardware issue might be at hand, but maybe there is something else I can try first?
And if it is an Hardware issue, what is the cause? The Display itself? Then why was a single point at the phone back the source of heat and not a large area on the phone front?
A short summary:
Phone gets hot while connected to charger
Battery won't charge (LED indicator turns off after few seconds)
Source of heat is 1cm to the right and down to the back camera; after 2 minutes whole phone is hot and you can't recognize the source
After days of repeating the action (connect to charger, disconnect, connect to PC, connect to charger) it suddenly charged the battery and didn't get hot anymore
Display won't start anymore; still responsive
Tried Xperia Companion Software repair
flashed latest Stock ROM
flashed Lollipop Stock ROM
Phone has locked bootloader and is/was not rooted. I'm grateful for all help!

I guess its a dead screen maybe u droped it and the pins of the screens got ejected from the motherboard.. Ignoring the fact that it was empty of charge and you charged it.
From what i understand that the phone is working but there is no screen.
The best thing u can do is to check a hardware store that is capable of diagnosing the issue.
Im not helping here i know but wanted to share my thoughts..
Gd luck with that.

Thanks for this anyway. But phone didn't drop.
The fact that the phone wasn't charging and got hot instead at the beginning is very irritating. Especially that it wasn't the front but a point at the back near the camera. Is there a way to check if it's a Display issue and not a Mainboard/Processor/other Chip issue?
At least in Germany are a lot of stores that aren't too competent at all. But nobody would tell you, so its very helpful to know as much as possible before going to a store.

I think it might have something to do with the gpu inside the soc? The heat might have burned something inside the mainboard (how hot was it btw, like running intensive apps or even hotter than that?) Another thing that might have happened is the display cable is loose.
I've seen some Z5's screens and they're not that easy to die.
The best thing I can suggest is that you repair it in a trusted shop that lets you observe the repair procedure directly (open the phone, take the parts out, identify the problem).
Good luck with your phone.

colorado48 said:
I think it might have something to do with the gpu inside the soc? The heat might have burned something inside the mainboard (how hot was it btw, like running intensive apps or even hotter than that?) Another thing that might have happened is the display cable is loose.
I've seen some Z5's screens and they're not that easy to die.
The best thing I can suggest is that you repair it in a trusted shop that lets you observe the repair procedure directly (open the phone, take the parts out, identify the problem).
Good luck with your phone.
Click to expand...
Click to collapse
I never played any game so it is hard to compare, but I never had a phone in my hands that got this hot before. You didn't get instantly burned touching the phone but it was already inconvenient hot for your fingers/hand.
There might be some trust able stores to find, but I doubt somebody will let you observe it, not even Apple store does. If you see the trick of how to repair it easy and fast, you might do it yourself next time. And it is also a question of the price. If I can buy a used but totally unharmed Z5 for the same price, why should I let it repair?
As far as I could see in Germany repairing Display starts at 99€ for the Z5. Buying display with adhesive would start at 49€. But if they change the Display and it's still broken you have to pay for the Display and also for the mainboard i.e.

Can a (going bad) battery cause the phone to boot loop?

Original battery.
Stock 5.01 (still) rooted.
The battery is fully charged.
LG logo, AT&T logo (and sound) then reboot. Repeat.
Just under a year ago, I bought 2 new batteries with external charger (Power Bear) because I felt the original battery was not lasting as long as it had previously. The new batteries seemed to deliver about the same time as the original so since then I've been rotating the three- charging using the external charger exclusively.
Around six months ago, I noticed that when the battery would reached to about 6,7 or 8%, I would be at risk for a "spontaneous" reboot, then a boot loop as described above. (this can occur w/the new batts too)
I quickly determined it was time to swap the battery and that's it.
In the past two months, THAT behavior has began to sometimes manifest itself with between 15-19% battery life. I thought, 'OK. Move on, the battery gauge is probably not accurately reflecting what's really left in the battery any longer.'
NOW, the original battery, though fully charged, is causing the circular reboot upon being inserted.
Can a battery "go bad" in this type of manner? Without really exhibiting significant "performance loss" (read: usage time)?
I'm thinking the orig battery can no longer deliver the proper current, or something like that.
To be clear, the other two batts work fine.
Anyone ever heard anything like this?
*edit:
An interesting piece of info: If I leave the phone plugged in to the charger, it DOES boot up fine and stay up. The second I PULL OUT THE PLUG, it reboots, and so on....

Yes it’s very very common. And is usually a battery issue. When it comes to the G3 anyway
Sent from my iPhone using Tapatalk

Did you ever figure it out? If it's not a battery issue maybe it's an LG motherboard issue, like everyone else who's had their G3 close to 4 years. In that case, do what I do, stick the LG G3 motherboard ONLY into the OVEN and BAKE it for 10 mins @ 360 degrees. Believe it or not, baking solves many of the problems, not charging, boot-loop, not turn on, blue screen, freeze ups, etc. I have 2 LG G3's, 1 AT&T and 1 TMobile, that I do this with. I can go weeks without having to bake them again but then sometimes when I'm driving and need my phone the most, it dies, won't even turn on. So it's not a permanent cure because it'll happen again, no doubt, the question is, how long...I laughed when someone said oh, just bake the motherboard. Well, come to find out the type of solder they used on the motherboard melts at a lower temperature so when it gets too hot some chips lose their connections, thus by baking it I guess it reseats the chips. Hey, it works every time after I bake it so I can't knock it.
Either way, give it a shot, it can't hurt your motherboard and if it fixes the problem, at least you'll know how to fix it and think about getting a new phone, like myself, lol. Instructions are quite simple.
1...Take back off
2...Battery out, Sim out, SD out
3...small philips head, remove 12 screws from back, the screw next to camera does not have to be removed.
4...remove both rear-housing assemblies
5...Remove motherboard by disconnecting the rear camera connector, front camera connector, lcd screen connector, and the touchscreen connector.
6...Now remove the motherboard, hold back the connectors when lifting the motherboard out. Do not bend or break the connectors.
7...Take the motherboard, piece of tinfoil or parchment paper (i prefer tinfoil), lay the tinfoil on a baking sheet/cookie sheet, and then place the motherboard on the tinfoil with
the CPU facing up. Pre-heat the oven to 360 degrees, when it beeps, put it in for 10mins. After 10 mins, pull it out, turn your oven off, let motherboard sit for 15 mins and put the phone back together. Be careful snapping the connectors back into their places.
8...Be surprised when your phone still actually works after doing something like that to it.
I actually just baked mine again last night.
Good luck.