mi mix 2s sudden death, need help troubleshooting - Xiaomi Mi Mix 2S Questions & Answers

Phone was working fine, charged before sleep, left turned on in idle.
Woke up to find it stuck on MIUI boot logo, must have rebooted itself sometime during night and stuck in a reboot loop (or stuck on logo without looping)
Pressed power button and screen went black.
Wont turn back on either by plugging in charger or pressing power button.
It charges though as I measured the current, it would have been at around 70% (so drained 30% during whatever happened in the night) as took another 1000mah before charging stopped.
Never had any issue before besides an incident a few weeks ago where I swore the phone was on but it was actually off and pressing power button wouldn't turn it on. Plugged it in and after a few mintues started up as normal (with charge still present) No other issue ever experienced like random shutdowns or reboots.

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[Q] HELP- did my phone die?

today i woke up like any other day, turned on my Infuse after having a fully charged battery and after doing my morning routine i went to work. on the car i did a random screen unlock, and lock (just to see the battery level), but when i get to work my phone didnt turn on; so i removed the battery thinking it froze, and when i tried to turn it back on after re-inserting the battery nothing happened. i tried plugging into the charger but nothing happens (no vibration, no bottom lights). when plugged into wall charger, after a couple of minutes, (the right side of the back camera) starts heating up for no apparent reason. plz anyone knows whats wrong or any ideas???????

Nexus 5 boot looping after complete discharge

UK Nexus 5, recently OTA'd to 4.4.3, totally stock.
Forgot to put the phone on charge last night, found it dead this morning. Put it on charge for a bit, had to take it off charge to use it only for it to die shortly later. Plugged a usb cable in to charge, phone would loop and not boot properly. It would get to either the Google logo or the Nexus animation. Held vol- and the power button but couldn;t select 'Power Off' in time from the boot menu as it would just reboot itself.
Got home this evening, plugged in the proper charger. It looped for a while, but now I've got it to boot where I could choose to Power Off. It's now on charge where it started booting/looping again once, but is now sat charging properly. I'm not sure if all this weirdness is caused by the battery being drained completely. I'm suspicious of the power button. I banged the phone around the button in case it was stuck and blew around the edges just before it started stopping looping.
Any insight welcome.
Thanks
UOTE=thecapsaicinkid;53377926]UK Nexus 5, recently OTA'd to 4.4.3, totally stock.
Forgot to put the phone on charge last night, found it dead this morning. Put it on charge for a bit, had to take it off charge to use it only for it to die shortly later. Plugged a usb cable in to charge, phone would loop and not boot properly. It would get to either the Google logo or the Nexus animation. Held vol- and the power button but couldn;t select 'Power Off' in time from the boot menu as it would just reboot itself.
Got home this evening, plugged in the proper charger. It looped for a while, but now I've got it to boot where I could choose to Power Off. It's now on charge where it started booting/looping again once, but is now sat charging properly. I'm not sure if all this weirdness is caused by the battery being drained completely. I'm suspicious of the power button. I banged the phone around the button in case it was stuck and blew around the edges just before it started stopping looping.
Any insight welcome.
Thanks[/QUOTE]it's not the power button. I have had this happen to, I thought it was a bug in TWRP, it usually only happens when the battery is low, or wait a minute no it doesn't happen when the battery is low for me it happens when the phone gets warm because I've been flashing something over and over in TWRP.usually I leave it in TWRP for a little bit then when I hit power of it actually stays off as long as I'm not charging it. I am dictating this using voice to text hence the mistakes and forgiveness backspace delete backspace
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Something I actually learned from paintball, a low battery makes technology go nuts. My Nexus 5 bootlooped with a low battery. It also said it stopped charging and basically acted like an overdramatic child with no cookies. After an hour on charge everything was good to go.

Overnight Charging [Redmi 4 not Booting ]

I don't know what happened to my phone (Redmi 4), I kept it overnight for charge and when I woke up to check my phone , it wasn't turning on at all.
(I kept it switched off at night while it was charging). It wasn't the first time I charged my phone overnight.
Tried Trickle Charging ,it's sill not booting . Although now I am able to boot into fastboot mode.
Is there any chance it might have been bricked ?
Any solution or would I have to pay service station a visit ?
Also whenever I press and hold power button it flashes mi logo for less than a second and switches off , also the led which used to get on during charge isn't getting on.

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.

Do you think this is a hardware problem or software problem?

I have a HTC 10 (new old stock) that I have been using for 2 months, on stock Oreo.
Everything was fine until last week when suddenly in the middle of reading an email the screen froze, a few seconds later the screen went black and would not boot up. Nothing at all, not even with a hard reset VOL DOWN + POWER or VOL UP + VOL DOWN + POWER. Tried holding it for A LONG TIME like 5 minutes, no luck. The phone had a hard brick and that's it.
Occasionally, after a few hours, I would try to reset it just for the hack of it. Or connect it to a charger (no charging light) Eventually after about 20 hours, it booted up again after I held all three buttons for a few seconds. Then it worked like nothing has happened.
It kept running for several hours, I charged it up to 100%, ran down to about 80%, then the screen froze again and died. Same thing happened, won't boot up at all. But if I wait another day or so, kept trying, it will boot up again.
I know the HTC 10 is known for it's horrible battery drain issue, and I have experienced that myself with another HTC 10, this is not it. The battery is running fine on this one. This is something else.
After doing this for a few iterations, I was able to figure out a pattern.
When the screen froze and the phone dies, it will not boot up no matter what you do. But for some reason something is still going on as the battery is still being consumed, a day or so later, when the battery is completed depleted down to 0%, and as soon as it hits 0%, whatever causes it to not boot unlocks and allow it to boot again, as long as you have it on the charger, the charging light will come up at that time, and as soon as it gets a little bit of juice, it will boot up again normally. Except when it does boot up, the date is reset to December 31, 1969 7PM.
After testing this for two more iterations, I am reasonably sure this is what's going on. Then I did a factory reset.
Once it's factory reset, I did nothing except turned on WIFI and didn't do any further setup except surf the internet a bit on WIFI, and about 10 hours later, it died again. Now I know, if I leave it alone for 20 hours, then plug it in for a few minutes, it will boot up again.
So here are my questions.
(1) The phone appears to have bricked during the 20 hours that is was totally non-responsive. What is happening that's consuming the battery?
(2) Does this seem like a hardware issue or software issue?

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