Second time randomly turning off and not booting. - Xperia Z5 Q&A, Help & Troubleshooting

For the second time in about a month, I took my phone out of my pocket and saw it wouldn't wake up. Holding into the power button wouldn't bring any lights on. I plugged into a charger and it showed the charging light but didn't immediately turn on. Held the power button a few times and finally it showed the Carbon boot screen but not the initial Sony boot screen. Like the last time, it's working fine now and other than these two incidents, I see no other issues. Could this be a ROM issue? I've been on Carbon for months and haven't noticed anything else.

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[Q] Is my phone Bricked?

So I was using CM9 RC Build after switching from AOKP. Nothing going wrong with my phone, nothing funny when suddenly I go to sleep with my phone on the charger and wake up to the phone being extremely hot with a white outlined battery showing that it's charging. Whenever I hold down the Power Button it Vibrates once and does NOTHING. Taking the battery out and putting it back in results in one vibration and nothing else. Just a black screen.
All I had done last night was sit my phone down as usual and get some sleep, and wake up to this.
EDIT: Okay, nevermind. It seems to not have charged one single bit...Sorry!

tf300t 4.2 unresponsive

Hi, I'm very new and also very frustrated with my tablet. I got it as a hand-me-down from my brother, and I think he got it in late 2012. I have had many problems with the tablet so I've tried cold-booting it but lo and behold! the cold boot won't work either.
First off, the keyboard does not work. USB keys are recognized and the trackpad works, but the keyboard doesn't.
At random times every 10 minutes or so the tablet shut off. I couldn't get it on unless I waited a very long time (10min-1hr).
Since the last time it's shut off, I can't turn on the tablet completely. Sometimes it went to the loop/loading screen and then the screen went black, or it wouldn't even get to the loading screen at all. I tried a cold boot once but it showed the dead Android icon with a red ! and it said error.
When I plug in the tablet the power button light flashes orange twice and then green. The keyboard dock light is orange.
I've tied doing a cold boot for the past evening but the screen doesn't even turn on, even when I've been holding the buttons down for nearly five minutes.
I've had this tablet for only a day and a half. I'm thinking the problems are because the tablet has been dropped and the corner between the power and volume buttons is damaged; also, the tablet hasn't been in use for a good 6-8 months.
Should I just forget about the tablet? I don' think I can send it in for repairs because it has physical damage.

Zenfone will not charge and turn on. All it does is buzzes every 1 and a half minute

I bought my Zenfone 2 about 3 months ago and it had been working perfectly fine. However, on the day before yesterday the phone appeared to lag more than it usually does but I didn't pay much attention to it. Later in the evening I noticed that the battery was not reducing and it remained constantly at 50%, despite me having watched at least an hour of youtube on it.
Later, when I was watching some videos online, the phone suddenly turned off - I thought that was because I had used up all the battery, so I plugged it into the main using the original cable and charger, but the phone would not charge and the little light on the top right of the phone never came on. I could not turn on my phone and all the phone would do was buzzes every few minutes. So since then, I have kept the phone connected to the charger (and it carried on to buzz twice every few minutes). I tried to turn the phone on yesterday morning by long pressing the button on the top of the phone but it would again not turn on at all.
When the phone is being charged, it buzzes every 1 and a half minute regardless of which charger or cable I'm using, and when the phone is not being charged, it doesn't buzz
Someone tried to help and suggested me to do the 3 following things:
1) Hold the power button for 15 minutes then let go and press for another few secs to try to turn the phone on - I did this, and the phone did buzz when i tried to turn it on, but the screen is still off, as well as the small light on the top right
2) hold the volume up + power button for 5 seconds, then release volume up before releasing power button - my phone buzzed after holding both volume up + power button for a few seconds, but still the screen did not come on and neither did the small light.
3) hold the volume down + power button for 5 seconds, then release volume down before releasing power button - nothing happened. The phone didn't even buzz.
I don't really understand why I was asked to do them, but i did them anyway
I am currently in the UK and I bought my phone from abroad so I cannot get a warranty fix in the UK.
Please kindly help if you know the the problem is and please give me some advice.
Much appreciated. Thank you.
bump
yoyohaha said:
I bought my Zenfone 2 about 3 months ago and it had been working perfectly fine. However, on the day before yesterday the phone appeared to lag more than it usually does but I didn't pay much attention to it. Later in the evening I noticed that the battery was not reducing and it remained constantly at 50%, despite me having watched at least an hour of youtube on it.
Later, when I was watching some videos online, the phone suddenly turned off - I thought that was because I had used up all the battery, so I plugged it into the main using the original cable and charger, but the phone would not charge and the little light on the top right of the phone never came on. I could not turn on my phone and all the phone would do was buzzes every few minutes. So since then, I have kept the phone connected to the charger (and it carried on to buzz twice every few minutes). I tried to turn the phone on yesterday morning by long pressing the button on the top of the phone but it would again not turn on at all.
When the phone is being charged, it buzzes every 1 and a half minute regardless of which charger or cable I'm using, and when the phone is not being charged, it doesn't buzz
Someone tried to help and suggested me to do the 3 following things:
1) Hold the power button for 15 minutes then let go and press for another few secs to try to turn the phone on - I did this, and the phone did buzz when i tried to turn it on, but the screen is still off, as well as the small light on the top right
2) hold the volume up + power button for 5 seconds, then release volume up before releasing power button - my phone buzzed after holding both volume up + power button for a few seconds, but still the screen did not come on and neither did the small light.
3) hold the volume down + power button for 5 seconds, then release volume down before releasing power button - nothing happened. The phone didn't even buzz.
I don't really understand why I was asked to do them, but i did them anyway
I am currently in the UK and I bought my phone from abroad so I cannot get a warranty fix in the UK.
Please kindly help if you know the the problem is and please give me some advice.
Much appreciated. Thank you.
Click to expand...
Click to collapse
bump

Nexus 5 won't turn on or display charging icon, no bootloop

I've had my Nexus 5 since it was released in 2013. About two years ago I started getting a dreaded bootloop and determined it was the power switch failing. I had the power switch replaced and all my problems went away.
About 6 months ago I started seeing the symptoms of a failing power switch. Random reboots which would go into a bootloop which I could stop by smacking my phone or cleaning it with video cleaner.
But then I that was getting less effective so I finally had the power switch replaced again. I have tested the switch itself, and it does close the circuit when pressed. But I am still unable to turn on my phone. When its plugged in I dont see the charging battery icon either.
But if I let it sit for a while, and hold down on the power button occassionally it will turn on and I will see the google logo, but then it shuts down. I can also hold down power+vol down and somtimes turn on in recovery mode before the phone turns off.
I can only seem to keep the phone on for 1-4 seconds before it turns off.
I'm assuming that there must be some hardware damage somewhere. Perhaps its thermal related? I havent tried freezing or heating the logicboard yet, but am now considering that. I need to boot it up long enough to transfer a couple files.
Does anyone have any thoughts on what I might try?

Black Screen of Death - Back to life, now only Always-On working, any help?

So after owning my original S8+ for 3 months, the battery died one night and upon charging the next morning, I had the black screen of death. The phone would respond to my touches, it would charge, etc but the screen would never come on.
I ended up getting a replacement and putting this one in my drawer for a year. I pulled it out a week ago and plugged it in to the charger randomly and still nothing. After 2-3 hours (enough to fully charge it), I started pulling and plugging in the charge cable, along with continuous power button cycles; and BAM, the screen came on like nothing was wrong.
I unlocked it, used it for hours, backed it up just in case; and left it running on wifi. After a couple days of it running down, it was still working fine. Once it got down to ~10% battery, the screen stopped coming on.
I charged it back up to 100% and I"m now getting the always-on screen to show up. I can see the battery %, date/time and the home button on the bottom
As soon as I hit anything though, either the screen to unlock, or the power button, the screen goes off. It is responding to my inputs and I can unlock the phone via intelligent unlock/pin code/fingerprint, but something is causing it to not light up once it kicks off the always-on screen.
I've tried resetting it, as well a pwr down+bixby+power to get in to recovery mode; but even once it restarts the screen still wont turn on until it gets back to the point the always-on screen would come on.
unboostedzc said:
So after owning my original S8+ for 3 months, the battery died one night and upon charging the next morning, I had the black screen of death. The phone would respond to my touches, it would charge, etc but the screen would never come on.
I ended up getting a replacement and putting this one in my drawer for a year. I pulled it out a week ago and plugged it in to the charger randomly and still nothing. After 2-3 hours (enough to fully charge it), I started pulling and plugging in the charge cable, along with continuous power button cycles; and BAM, the screen came on like nothing was wrong.
I unlocked it, used it for hours, backed it up just in case; and left it running on wifi. After a couple days of it running down, it was still working fine. Once it got down to ~10% battery, the screen stopped coming on.
I charged it back up to 100% and I"m now getting the always-on screen to show up. I can see the battery %, date/time and the home button on the bottom
As soon as I hit anything though, either the screen to unlock, or the power button, the screen goes off. It is responding to my inputs and I can unlock the phone via intelligent unlock/pin code/fingerprint, but something is causing it to not light up once it kicks off the always-on screen.
I've tried resetting it, as well a pwr down+bixby+power to get in to recovery mode; but even once it restarts the screen still wont turn on until it gets back to the point the always-on screen would come on.
Click to expand...
Click to collapse
Wow you hyped me up at 4 am I woke up and started to unplug and plug the phone while pressing the power butto
Now by chance have you guys tried to order a battery just to see. Samsung's are noted to do really weird stuff if the batteries are failing
vtech7634 said:
Wow you hyped me up at 4 am I woke up and started to unplug and plug the phone while pressing the power butto
Click to expand...
Click to collapse
So not to get you excited again at 4am but... I was able to get it back to life after plugging it in and letting it charge fully then repeating the steps in my original post.
It is definitely an error relating to the waking of the phone from the always on screen. I discovered this after toggling the always on settings then using the plugging/unplugging, home button press on the screen, power button harassment on the phone, causing it to finally spazz out completely and then out of nowhere the AOD blasts on.
i know this, it seems to be perfectly ok again until the battery does start to die. once it gets down to 15-20%, it will eventually go dark again until i get lucky and it gets enough juice aid/or tired of me touching everything at once.

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