My unit doesnt turn on most of the time - MTCB Android Head Units Q&A

Hello
I have a problem with my unit. it did not turn on anymore so i borught it inside and connected it to a bench psu and after 10 min it turned itself on. now 1 day later it wont turn on again (still on the bench).
while its dead it draws no current.
Edit: it tuned on again. :-/

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Advice Needed.. Touchscreen has stopped working, 10 minutes to boot...

Hi all, I've had my Desire since they 1st came out, so about a year and a half now.. Had the same rom on there for about 10 months..
Last night I was sat at my desk and the phone just slides out of my pocket onto the floor, no big deal and it's not a big drop at all, I pick it up and go to turn wifi off and the phone just turns itself off, I try turning it back on and it stays on the pink logo for ages.. about 5 minutes before it reaches the lock screen but I cannot go any further because the touchscreen is no longer working.
The charge light doesnt come on, the battery icon is red all the time and the big battery appears on the screen saying please plug in charger, if the charger isn't plugged in then the phone just turns itself off.. Battery is 100% full and I even charged it on my partners desire and also tried her battery but it's the same.
I can access the bootloader but I cannot select anything as when i press any button the screen just turns off, and when i press any button again it comes back on. The phone will stay running in bootloader mode from the battery for hours and hours so maybe this could help pinpoint where the issue is as when the phone is on the lock screen it claims the battery is dead when it clearly isn't.
The phone still has reception and even H is connected still but I can't do anything at all.
I'm hoping somebody will recognize these symptoms so I can perhaps buy the correct part to fix this.. I'm pretty sure the fault is not the screen.
I have the phone layed on my desk now, I've stripped everything away and just left the screen and board, attached battery.. Same issue.. Detached screen and plugged in charger with battery attached, no charging light..

[Q] Galaxy Nexus not turning on

hello guys
last night i purchased a used Galaxy Nexus i was using it and its battery reach to 30% so i turn off the screen put it on table and i sleep. In morning when i woke up the phone was off and not turning on. I connected the phone with data cable and try to charge it but the charging icon showed on screen and then screen blink and phone off and after 4-5 sec it again show up and off. After 1 min phone viberate turn and google appear on screen and turn off and now nothing happen. I keep the cable plugged in for more than 40 mins but phone still not turned on. My phone is stock runing 4.3 lates update. If you guys can help me what i have to do i will be very happy. I searched and google it alot but cant find a solution. and my nexus charge very slowly on data cable in 2 hours it only charged to 20% battery.

Moto 360 Won't Turn On Or Charge

A couple days ago it was working fine, however I noticed it gradually charged slower and slower to the point where, even when it's on the charging cradle, it loses charge. Now, whenever I put it on the charging cradle, the screen won't even turn on, and the device will not power up. The light on the bottom of the charger lights up, but the device receives no charge. I'm using the default Moto 360 connector cable, and I've even tried more powerful adapters, but still nothing. I decided to listen to any advice I might could get here before I call Motorola support.
my moto 360 is not turning on . can anyone troubleshoot this issue?
Mine got stuck in a discharge loop, was discharging on the charger, the charger was not recognizing the watch (charger light off).
The direct usb connection powered on the watch but did not charge it. No leaving it on/off the charger worked. It was dead.
The fix was to take it apart and unplug/replug the battery. It started charging normally afterwards. Now it won't stay closed, and the face keeps coming off, I press down on it from time to time and maybe I'll use some superglue
executivul said:
Mine got stuck in a discharge loop, was discharging on the charger, the charger was not recognizing the watch (charger light off).
The direct usb connection powered on the watch but did not charge it. No leaving it on/off the charger worked. It was dead.
The fix was to take it apart and unplug/replug the battery. It started charging normally afterwards. Now it won't stay closed, and the face keeps coming off, I press down on it from time to time and maybe I'll use some superglue
Click to expand...
Click to collapse
Couldn't we talk to Motorola about this? Shouldn't this be considered a manufacturers defect?
I talked to Motorola support, and after hours of phone calls, they said they would replace mine for free. But because the watch was in such high demand, I couldn't get a replacement watch for like 2 months. They seemed shocked that the device had stopped working, and it seems there aren't too many cases of this happening. I'd recommend calling Motorola support before doing anything drastic like taking apart the device.
I don't have warranty, so I can't call for help.
Mine got stuck while trying another Qi charger, so I guess only the charging chip got crazy, the watch worked normally until it drained the battery.
The charger has 2 modes: low power to signal the device it's on the charger then the device (be it phone or watch) should signal back to the charger it's present and the charger goes on the high power output to actually charge the device.
My watch had the charging chip blocked so it didn't signal back to the charger which remained in the low power state and did not provide enough power to charge the watch.
Factory reset and even USB reset did not reset the charging circuitry, only a hard reset by pulling out the battery did the trick.
By the way to take it apart it's not needed to remove the dreadded cracky plastic back, only hold by the strap and rock the case upward/left/right. Tough fingernails and a little help from a plastic wedge near the button and in the opposite side did it.

Charging issues after resurrecting water damaged phone

Last month I had no other option but to walk in rain and as a result the beautiful Robin refused to turn on. But luckily after few hours it turned on and worked normally until I connected the phone with Nextbit's charger. The turned off immediately after connected the charger. I tried to turn it on again and again but It was completely dead. I thought the phone is gone and left it on the closet for a week. Later when I tried to turn it on last week, I found myself lucky again and the phone turned on again. It is working normally now. But the charging has some issues. Whenever I try to charge it using Nextbit's charger or other Quick Charge 2 charger at first attempt the phone shows 'charging' but it actually doesn't take the charge. But at second or third attempt it shows 'charging rapidly' and only then it takes charge as it did before.
What could be the cause of this?
Most likely just broken pins.

Phone turns off suddenly for a long time

Hello,
I have a really strange problem with my A50FN/DS.
The phone turns off by itself and I can't turn it on for a minimum of two days!
Recently I had the phone plugged into the charger and it had 3% and I was watching a movie on it, all of a sudden android freezed, made a high pitched sound and a thin green line showed on the screen - the phone turned off after maybe 10 seconds. I unplugged the phone from the charger for 15 minutes and plugged it back in for the rest of the night but in the morning and for the rest of the day, the phone would not turn on. In the evening I plugged the phone into the charger and accidentally hid it under a thick cover - after an hour I came back to see if the phone would turn on, I noticed it was warm bcs of cover, I held down the power button and the phone turned on but despite charging all night it had 0% battery.... And so it worked for three days but today when I had the phone connected to my computer (I'm testing applications I'm writing) the phone turned off again and won't turn on, and on the computer I get a message that the computer can't recognize the USB device.
What could be wrong? This is terribly strange to me!
If u need any information - let me know.
What I know:
- During this time, the phone turned off twice and only when it was plugged in or connected to a computer
- I'm not sure but it turns on when I plug the phone in and hide it under, for example, a pillow to get warm. Edit: Confirmed - i plugged him in and cover him with pillow for like 40 minuts and after that time he turns on...
Failed battery, start there.
battery samsung galaxy A50

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