820-2533-b no magsafe light

Nick

New member
hi, got this board that had a short on pp3v42_g3h near smc. very oxided. no oxidation anywhere else. received a good bath in my crest. the shorted caps were C4902 and c4905.

i have no fan spin not even shorting smcon naturally, but i do not even have magsafe light. i tried another magsafe daughterboard but stll nope. using an OEM 85watt. the weird part is that
Adapter sense is 3.3v
smd_bc_acok_ vcc is 3.3v
sys_onewire is 3.3v
smc_bcacok is 3.3v
pp3v42_g3h is 3.34v
 

Nick

New member
Reballing smc did nothing. Today my donor arrived, replaced smc but nothing. After replacing u6901 sys one wire was gone. I checked on diode mode under smc with donor and found out sys one wire had a value completely wrong. Turns out the via was damaged but not too much. A small bridge fixed the machine. Got light and fan spin

bxjEbiO.jpg
 
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