LG V10 - Screen dead/black screen/no display - AT&T LG V10

All of a sudden my phone started rebooting on its own. Then while using it started to vibrate for like 10 seconds until I removed the battery. Then I turned it on and on the home screen it stuck. I had to pull out the battery. and since then it wont turn on! When i push the power button it vibrates like it does on the startup but theres no display. Two times in the process, " battery too low to turn on" message has been displayed & nothing else! same vibrates at startup and no display problem. HELP

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[Q] Can't see anything on display

WARNING: not a native english speaker.
when I try to start the phone the following occur:
the display light turns on, shortly after that the phone emits that startup vibration, the backlight remains on for aprox. 85 seconds then the phone aparently shuts down. that meant, the backlight of the display turns off.
problem history:
I was at work and as usual i was listenin to music via handsfree. while my phone was in poket it seemed that somehow my poket pressed the sleep button and turned the screen up. no prob here. i got the phone out of ma poket. reverted the volume @ maximum and then locked the phone and turned the screen off and putted back in pocket. after some time i wanted to change the song. got out the phone, turned on the screen but nothink apeared except a horizontal line in the middle of the screen. I tried to shut down/up the screen but nothink apeared. after a couple of tries the screen turn on but it was unusual what i saw on it. I saw a sketch of the energy rom home screen with diferent colors.
Meantime i was tryng to get the screen outta sleep the music still played in the phones.
I thaugt that a reset will do but it didn't. got out the battery and got home. reasembled it, powerd up the phone and voila! the phone started up normaly. got out the battery, introduced the sim card. powerer up the phone but bad luck. the happiness was short lived. the problem camed back. another thing i noticed is that when i powwer on the phone i let it on but it wont output that energy rom bootup sound.
Can someone elude me with whats the problem with my phone?
hope I was clear enough!
Have a great day/night!
UPDATE: LEFT IT OVERNIGHT WITHOUT THE BATTERY AND NOW ASSEMBLED BACK. IT'S WORKING BUT I THINK IF I GIVE A RESTART THE problem will come back.

[Q] Phone turned of and not turning on again

I Think that its the power button that is stuck but im not sure
My phone started going crazy, when I turned it on, it was going to the HTC logo and then turned off (After about 3-4 seconds, Not showing CyanogenMod logo.)
and when I managed to turn it on (Remove the sim-card and turn it on normally) it worked, and when I inserted the simcard the phone got stuck and disconnected.
I Cleaned the simcard (Rubbed it against my pants..) and the phone worked for about 30-60 minutes, not sure.
After that 30-60 minutes, i saw the screen turned on showing the lock screen, then it asked me if i want to power-off or reboot, i pressed the back key.
And the phone turned off.
Since then i cant even turn it on..
And when i plug in the power adapter, no LED going on.
so i disassembled it, And disconnected the battery, and when i connected the battery again the phone turned on as if i am pressing the power button showing the htc logo and then turning off again..
and i cant turn it on..
SORRY for the long story..
I Checked (Using a multimeter) And the problem is not withing the power button or the battery (Battery gives out 2.9 volts instead of 3.7 as written but its because low battery..)
Still the phone wont charge

Moto g 2nd generation display turns off

When I start my Moto G2 (XT1038) from cold, the entire boot animation plays and the home screen shows and the phone works fine. The moment the phone is locked and I press the power button to turn the screen on and entire my pin, the area near the microphone heats up rapidly to a point where I can not touch the spot for more than a few seconds. The screen stays blank though. After a few minutes of inactivity the area cools down. But if I try to turn the screen on the same thing happens. Meanwhile, I can hear the alarms I have set in my phone, go off at designated times, can hear the incoming phone call rings, SMS / message notifications, etc. But cannot get the screen to come on after the initial bootup. Can not turn off the phone either, same thing happens. Battery lasts as usual. No heating issues while charging. Any ideas why this might be happening? It is running Marshmellow at the moment, and the update happened many weeks before this issue. Auto-updates are turned off.
Not sure if I need to replace the display or battery or some other hardware.

Phone bricked after batter replacement

I replaced the battery myself.
After finished, I trun on the phone, it vibrates once and the screen light up a little (hardly see it) but cannot boot. When I press and hold the power button, it turns off but on again automatically with the same phenomenon. What did I do wrong? I can charge the battery (the LED changed from yellow to green).
I had this to several times after changing battery. I had to disconnect the battery and connect it again every time it happened, not so funny opening the phone up every time...
After a few times it just started to work normal. Strange.

[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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