820-3787: Not powering up but fan spins/stops/then remains spinning

[macRepairAmb]

Have this board, no liquid damage or corrosion found. The fan spins for about 10sec then shuts off, then starts spinning again and remains spinning. The fan then ramps up slowly until it reaches max speed.

Theres no USB activity, only a initial flash of the usb light when connected

Cpu voltage is at max and not ramping down. PPVCC_S0_CPU_REG - 1.8v

Any suggestions

 

[2informaticos]

What the client said about how fault appeared?

PLT_RESET_L present?
All GPU related voltages present?

Try known good working BIOS.

 

[macRepairAmb]

PLT_RESET_L preset @ 3.3. All gpu voltages are also present
Put in a know good bios with the same result.

 

[2informaticos]

GPU, or CPU problems probably...