820 4924 liquid damage

[EJS]

820 4924 that had two very small spots of liquid damage in the u1900 and r5689 area, the rest of the board looks very clean. I have replaced u1900, u1845 c1924, R5689. Those were the only components that looked like they have been affected by the water. I get green light on magsafe, and The First missing line is PP5V_S3. All of the Rails before that one are present and correct. CPUVSENSE_IN appears to be shorted, with a diode measurement of .009v. I'm kind of lost where to go next with this...

 

[dukefawks]

PPVRTC present and 32kHz coming from U1900? Check for power cycling on 5V_S4 with a scope as multimeter may be too slow to catch it.

 

[EJS]

3.325v on PPVRTC, I do not understand what you mean by 32KHz coming from u1900, also I do not have a scoop and can not see any power cycle coming from 5v_s4.

 

[dukefawks]

Exact value of PPBUS? 3v3 present on L7560? Check all rails for shorts.
Possible crap under the SMC? Crap on J6100?