820-00923 no display

Soji

Member
The board draws 20V CPU gets warm too
liquid spill on the motherboard the affected area was U8510 and c7434,c7436,c7437 are corroded...
I replaced all components and no changes..
I took some readings around u8510 compared diode mode readings to good board found r8592 pin 2=BUF_SMC_RESET_L is 0.078 instead of 0.358..

Dont know how many volts passes the line now injected 0.9volts now found U5000 heating...
Then i replaced u5000 board now draws 5V not coming up
Am sure i replaced it well..
 

2informaticos

Administrator
Staff member
Something else affected by heat.
Or the new SMC is bad.

Just in case, check diode mode to ground at EDP_INT lines of J8500.
Pay atention to pins 1 & 3.
 
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