820-2915 missing PM_SLP_S4_L

Chuck60

Member
Ok will do 180 degrees with AMTECH flux on both and no it didn’t anything. I reinstalled R1985 testEd with R2502 Removed and I have 3.42v coming from smc on on pin 1 of the location of R2502 with resistor removes . Is this correct? 3.42v out from pin 49 of smc?

I tested at the location of R1985 without resistor and at first it was 3.3v on pin 1, pin 2 had zero. I held it there for 20 seconds then the 1.6v came up again. What else could be leaking voltage on this line as I have found nothing else connected ?
 
Last edited:

2informaticos

Administrator
Staff member
R1985 pulls-up PM_PWRBTN_L.
SMC, or PCH can only sink current.
One of them is bad, or corrosion between balls pulls-down the signal.
 
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