820-3330 fan turn but nothing more

raainxx

Member
Hi,
this board nice (no liquid) don't boot, only fan turn, green light.
I check the power rail, seems good except PPVCORE_S0_AXG_REG,PPVCORE_S0_CPU =0v
PPVCORE_S0_AXG_REG= PPVCORE_S0_CPU = 1,2ohm, is it normal?
CPUIMVP_VR_ON = 3,3V
PPBUS_G3H=12,59V
Dead U7400?
thanks
 

2informaticos

Administrator
Staff member
"PPVCORE_S0_AXG_REG= PPVCORE_S0_CPU = 1,2ohm"
Normal value for i7-3xxx (Ivy Bridge)...

ALL_SYS_PWRGD stays high?
R7402/03 OK?
 

JohnB8812

New member
Yeah this is not looking good. Check resistance between pin 2 of the PPBUS fuse and CPU Vcore. If it's low, this is probably trash.
 

raainxx

Member
PPBUS fuse = 320Kohm
CPU VCORE = 1,2ohm
No pulse at all at L7510/20/30, nothing
pin48 of U7400 = 1,05V
No corrosion, very clean board. is it GPU?
 

dukefawks

Administrator
No it is not the GPU there is no Vcore. You ca try another BIOS, but after that it is probably a bad CPU/PCH.
 
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