[HELP] OnePlus 7 Dark screen even after hard reboot - OnePlus 7 Questions & Answers

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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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.

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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

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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...

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