820-00426 No USB activity

[No-Clean]

Clean board, backlight present but no image or USB activity

Already tried clean ME but same thing.

PPVCC_S0_CPU 1.8V

 

[2informaticos]

Heat GPU for test...

 

[No-Clean]

Done, even put it on oven but still no USB activity.

 

[2informaticos]

Did you try full known good BIOS, or just cleaned its BIOS?

 

[No-Clean]

Know good BIOS yes, but just in case I tried another good one and same thing.

 

[2informaticos]

What client said about the fault appeared?

PLT_RESET_L comes high?

 

[No-Clean]

Mac came from another shop untouched but no history available.

PLT_RESET_L 3.3V

 

[2informaticos]

Bad CPU probably...