820-2915-B PPBus_G3H=1.2V

[javier_herart]

R8613= 10k
R8612=10k
R8610= REMOVED

On external monitor turn white/grey (just like if it were going to show the folder.)
Internal LCD is black, like if it was disconnected.

Caps Lock light does react.

 

[2informaticos]

Check on external monitor booting ASD, or accessing boot menu.

Did you check some voltage and signals on the LCD connetor.
Internal screen should have same (no) image as external.
So there is a problem too.

PRAM reset done?
You can try known good BIOS, just in case.