820-2915 FAN SPINS BUT DOESN´T STOP TO POST

[2click]

Hi, I have this 820-2915 and I have green light, the fan spins, but in this model the fan normally starts for a couple seconds then stops, and start again. It spins but doesn´t stops to make the POST.
PPBUS_G3H = 12.6V
ALL_SYS_PWRGD = 3.3V
PLT_RST_L = 3.3V

I REMOVED U9600 SEEMED TO HAVE CORROSION ON THE BOTTOM, AND WAS PLANNING TO JUMPER TO THE IG CHIP. CAN THIS DO THAT BEHAVIOR?

THANK YOU!

 

[2informaticos]

Reball GMUX and see if something change.
If not, then disable GPU in BIOS.
Do NOT waste time bypassing GMUX; too much work...

 

[2click]

Where can I find the reliable steps to disable it via BIOS?

 

[2informaticos]

Medusa programmer can do it.

 

[2click]

I don´t have the medusa, but have a programmer. Where do I get the BIOS?
I reinstalled the U9600, now I get a quarter fan spin, and when the spin is about to start spinning PPBUS_G3H goes from 12.60v to 12.30v, does this means it has something to do with the SMC?