820-3115 : 1 sec fan spin loop with corrosion on LVDS side of mb in multiple places

pauly341

New member
820-3115 stuck in 1 second fan spin loop. Multiple places with corrosion, cleaned well with ultrasonic.

Replaced u5400 and ran wires reconnecting it to R5400.
Another bad trace between Q5490 and r5494 fixed

pm_slp_s3_l is toggling on and off and I traced it to multiple places on the board looking for it's souce. It's produced by U1800 per the schematic but then I see that is has something to do with GPIO29 which is related to SLP_LAN. Is the LAN somehow putting this machine into sleep mode.

much appreciated,
Paul
 
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