Hello all smart people.

I need help with DELL G7 7700
Service tag 973JHX2

After connecting the power supply, the screen does not turn on, the fans spin, the consumption is stable about 85W.

I tried to load the BIOS from another, but there is a problem with the service tag. Otherwise everything worked.

I tried to modify the BIOS, combine the non-working one with the working one, but it does not work, I probably do not have the right procedures, equipment and experience for this.

Can anyone help?...