820-00165A

[Quickfix]

fan spin, No p1v05s0 and no cpuvr what should i check?

 

[2informaticos]

ALL_SYS_PWRGD goes high?
Do you get voltage on the other big coils?

 

[Quickfix]

Thank you, it was r7612 i replaced it getting all voltage but no back light 22.8v on c7799 i test with working screen it's same and r7704 1.4v any idea?

 

[2informaticos]

Try PRAM reset 2-3 times, then check pressing backlight up key.

 

[Quickfix]

no it didn't work

 

[Quickfix]

it was u7701 replaced it working fine thank you