Question Getting out of this limbo

[Indisparte]

This morning I turn on the PC, part of the BIOS update but, does not end
The PC darkens and seems to want to turn off but ... It doesn't

My HP with Windows 10 does not receive any input. The screen is off, the fan is spinning very hard, the power off button does not work, the key combinations do not work

I'm waiting for it to discharge, it's the only thing I can do at the moment but it seems to take a lifetime because only the fan is active, I don't know what to expect when I load it and turn it on.

 

[rgd1101]

how long did you hold the power button to shut it off? 30 seconds?

 

[Indisparte]

how long did you hold the power button to shut it off? 30 seconds?

One minute. Now the pc is discharged. I'm reloading it and I noticed that, when turned on the caps lock flashes so it's a BIOS error
I created a USB with the updated BIOS on top and I'm trying to start it keeping WIN + B but it still seems not to be good

 

[Indisparte]

The caps lock emits 3 long and 2 short flashes but I can not start the BIOS even with external stick. I tried with WIN+B, esc several times, f10, f6, f2

 

[rgd1101]

if the bios is corrupted. won't be about update bios with usb.
is it sill under warranty? or need a pro to flash bios with a programmer

 

[Indisparte]

if the bios is corrupted. won't be about update bios with usb.
is it sill under warranty? or need a pro to flash bios with a programmer

It is no longer under warranty, I went to the official HP website, formatted a USB on which I then installed the latest BIOS.
Inserting the USB and holding WIN+B should be able to update it or am I wrong?

 

[rgd1101]

bios stand for basic input/output system.
that is broken so there is no input/output