820-00165 no power

[G.Beard]

Liquid damage minimal - R5117, replaced.

Inspected board at 45x, no signs of further liquid damage.

PPBUS = 8.6
3V42 = 3V42
S5 rails = 3V3 and 5V

SMC_ADAPTER_EN = 3V3
PM_SLP_S5 = 0V
PM_SLP_S4 = 0V

No power cycles

Any thoughts please?

UPDATE: Replaced R1451 PM_DSW_PWRGD.
Now fan spins up for 10 seconds and then off. Connected a fully charged working battery to check for USB initialization but nothing. all_sys_pwrgd goes high while fan spins.
Also powers on from battery in the same way but no mouse LED. CPU does get hot.

 

[dukefawks]

CPU Vcore present I assume? This could really be anything, corrosion under SMC or something stupid.

 

[G.Beard]

CPU Vcore present I assume? This could really be anything, corrosion under SMC or something stupid.

All power is there for the time the fan spins, incliding CPU.
i already put another SMC on there just to check if there was crap I could not UC out of there.

Guess I'll check all the PCH signals and see if that leads to anything.

 

[dukefawks]

This one will suck, these symptoms can be anything really.

 

[G.Beard]

This one will suck, these symptoms can be anything really.

Yep, I know.... These things are like a black hole. Every now and then I gravitate toward it and before I know it, I've lost an entire day.
But, I post in hope.

Never mind, it's going back.

Thanks Duke.