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?

 

[2informaticos]

That's no ggod; PPBUS_G3H MUST be stable.

Re-check your job.
What happens that only have quarter fan spin now?
Check for short on any secondary supply GMUX related.

See what happens starting in SMC bypass mode.
Check resistance between pins 17/18 and 27/28 of U7000.