HP 17-by3000ns turns on but won't boot after Windows 11 update

[Xosema]

Hi all.

I updated Windows 11 just today and after rebooting the laptop turns on (fan is spinning) but the screen remains black. No sounds, no HP logo, no Windows 11 starting... just black screen. I disconnected all USB drives, unplugged the laptop (this model has an integrated battery, so I can't extract it) and pressed start button 15 to 30 seconds, then plug it again, but screen remains black. Tried too to reset BIOS with windows key + b + start button, but it remains the same. Tried too to connect the laptop to a external screen, but it shows no signal. Any idea of what could be the problem?

[Xosema]

I tried a few more things. I disassembled the laptop (out of warranty) and tried:

-Extracting battery and plugging the laptop. Laptop turns on but remains with black screen.

-Extracting one RAM module each time and powering the laptop (without battery): laptop turns on but remain with black screen.

-Extracting BOTH RAM modules and powering... laptop turns on, black screen, no sounds, no beeps, no warnings...

-Extracting solid state disk. The laptop NO turns on: no fan, no beep, nothing...