820-3024 No CPU_VCORE

phuketmymac

New member
Hello,

That board is missing the CPU power rail but it is in an S0 state.
The CPUIMVP_VR_ON signal is on at 3.3V

Corrosion was worth between R2415 and C2411, on the probe point, rail PP1V05_S0_PCH_VCCDMI_FDI
This rail is at 0V.
That rail comes from PP1V05_S0 which is present at 1.05V

Probe point is gone and I try to dig a small hole to attach a wire and reconnect it to the resistor and capacitor.
It seems that I did it but still no CPU rail.

I've replaced since U7400 as well as Q7510 and Q7520 but no cigar.

One more thing... PPBUS_G3H is at 8.4V but SMC is on. Is that normal on the board?

Thanks!
 
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