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PPBUS - 12.60V
PP1V8_S0 - pulsing too
PPCPUVCCIO - pulsing too
PP1V5_S3 pulsing too but it goes slowly to 1V and each 8 seg goes to 1.5V
CPU CORE - 0V
PP1V05_S0 - Pulsing too
PPVCCSA_S0_CPU - Pulsing too
ALL_SYS_PWRGD - Pulsing too
I removed R7974 but no results.
Some chip short ALL_SYS_PWRGD to grounf and SMC shutdown the board? Is that what happend?
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If I remove U2850
PM_S0_PGOOD - 0.10V
CPUIMVP_PGOOD - pulsing
ALL_SYS_PWRGD - still pulsing
So, it is not CPU power supply and PCH as I see.
Cannot find U7980 and Q7970 on boardview to test more.