[Q] The phone keeps turning on and off by itself - Nexus 5 Q&A, Help & Troubleshooting

Hi,
I have a Google Nexus 5, which is less than a year old. This morning I unlocked my phone and two seconds later it turned itself off. And ever since then its been turning itself on and off while its connected to a power supply. And when its not it just stays off.
Trying to turn it on doesn't work since the screen doesnt get passed the GOOGLE screen before it automatically turns off again.
Please help

Maybe you have a stuck power button. There are already several threads about this issue here on xda. Use the search tool

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HTC Dash Crashing

My friend recently gave me an HTC Dash for T-Mobile. It's running WM6.1 Kavana's ROM 1.33.424.2. After he gave it to me I unlocked for AT&T completely, 100% legally. I called T-Mobile and they gave me the unlock code.
But since I've been using it it will randomly turn off. It seems to shut off more often using MMS or anything through the Internet, but it will also turn off just sitting in my pocket or while texting. Luckily it hasn't ever crashed during a call.
When I try to turn it back on it will either shut down before fully turning on (it will show the boot screen but turn off), it will turn on but say the battery is dangerously low and it needs to be shut down, or one time it had an error message saying "The device could not be started due to sudden loss of power. Click YES to continue or NO to shut down. Please be sure the device is completely shut down before removing the battery." If you click YES it shuts down. If you click NO the screen turns white then tries to start up a few seconds later and fails.
The way I stop this is plug it in to a charger and turn it on so it can't die. It says the battery is low but since its plugged in it won't turn off. Then once it turns on I turn it off normally by tapping the power button and selecting Power Off. Then I take out the battery, put the battery back in, turn the phone on, and then the battery is back to the power level it was before the crash and the phone works fine again. But any texts or calls I had made in the past few minutes are erased as if they hadn't been made, sent, or received.
I've already tried a few hard resets and it doesn't seem to work. I even downgraded to WM6. I just want to know if this is a software problem, a battery problem, a hardware problem, or something else. Thank you to anyone that can help.
Welcome to the forum
I assume that your battery is working ok right?
Try with a hard reset
Read here:
http://forum.xda-developers.com/showthread.php?t=397583
And:
http://forum.xda-developers.com/showthread.php?t=415225
Good luck,
I've tried the hard reset a few times, I don't know whats wrong.

oneplus one won't turn on!!

My opo device is not responding at all. I was using the device normally and suddenly the screen turned black and since than its not responding at all. My device was not rooted and i was using the CM 13.1 stock. The device had around 50% battery when it turned off. I have tried power cycling it and pressing the power and volume down button but still nothing. It won't even turn on and there is no vibration or anything when i am holding the power button. Can anyone please help me!!
Bump. Mine too. Nothing, totally dead. How do I do a factory reset if I can't even turn it on?
your device has this been recognized qsbusb_bulk
Possible fix
https://forums.oneplus.net/threads/solution-recover-from-hard-bricked-oneplus-one.104943/
Mine too, but after i kept the power button pressed for 3-4 minutes it rebooted...i was running cm13.1

Alcatel idol 3 wont turn on!

Hey i am new to this forum,so sorry if i am posting this in wrong section or smtn like that .So yesterday i was searcing the web when suddenly my screen turned completely blue!That lasted for about a second ,and then it came back to normal.After a few seconds it happened again but many times in a row.I tryed to power it up ,but on boot,it turned blue again and shut down again.It was off whole night,and at morning,it booted normaly,andbi managed to move all my data to computer.After i finished that,i tryed looking what could be the reason for this to happen.But phone shut down again.Till now i was able to turn it on for about 2-3 seconds and then again shut down.The thing that i noticed is that when phone is booting,it will warm up pritty fast,but not at some high temepratures,but that much that i can fill that it is hotter.I decided to try to put it charging,but the battery icon would appear,and after few seconds screen would be blue again,but it would charge.I also noticed that led indicator was showing charging but with low light.I decided to factory reset,oressed few buttons and screen turned off,but led indicator became much more noticable.Now it wont turn on.I tryed power cycle but it does nothing.Any solutions?My phone is alcatel idol 3 6045k with stock 5.0.2 android.
assuming your phone has a charge.
press and hold the power button till the acatel boot screen shows up.
the phone should reboot this may take 30 seconds to 1 minute to reboot.
you might see if you can get into the boot loader also.
it could be worse issues wich others here might be able to help more with.
Sounds like a hardware failure. I recommend sending it in for repair or replacement.
warranty repair...

Phone Randomly Switches Off & Becomes Unresponsive

Hi,
I've had this Moto G3 for just over 6 months now and have had no problems with it until very recently. Basically, I was trying to add a new Google account to the phone earlier, but after entering my PIN to access the Google screen, the phone froze, and I had to force reboot. Startup took slightly longer, but then the phone switched on.
Two hours later, I picked up the phone and pressed the power button. Nothing. I pressed and held, for about 12 seconds. Nothing. I unplugged and replugged the charger. Nothing. I put the phone down and went on my laptop, and suddenly, my lockscreen appeared.
It then did the same thing later. What's happening? It can't be the charger, or the battery. I've never rooted or modified the system things on the phone, it's close to stock Marshmallow. Any help?
Have you tried a hard reset through recovery mode?
loganwaffle8 said:
Hi,
I've had this Moto G3 for just over 6 months now and have had no problems with it until very recently. Basically, I was trying to add a new Google account to the phone earlier, but after entering my PIN to access the Google screen, the phone froze, and I had to force reboot. Startup took slightly longer, but then the phone switched on.
Two hours later, I picked up the phone and pressed the power button. Nothing. I pressed and held, for about 12 seconds. Nothing. I unplugged and replugged the charger. Nothing. I put the phone down and went on my laptop, and suddenly, my lockscreen appeared.
It then did the same thing later. What's happening? It can't be the charger, or the battery. I've never rooted or modified the system things on the phone, it's close to stock Marshmallow. Any help?
Click to expand...
Click to collapse
Send it to Motorola, best advice you can get.

[HELP] OnePlus 7 Dark screen even after hard reboot

Hello!
I woke up this morning with the alarm of my recharging Oneplus 7 only to find out that the screen wouldn't turn on, so I couldn't shut the alarm off. I unplugged it, still nothing, re-plugged it, still nothing.
I then proceeded to force it off by pressing volume up + power for a few seconds and it made a long vibration, showing I think that it rebooted.
But the problem is still here!! The alarm still repeats every 5min and the screen won't turn on!
I tried all this multiple times and it's not working...
Any idea that might help me please?
Thank you!
If your phones screen doesn't show anything even when in bootloader i think your screen is dead

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