[SOLVED] 820-3462 MBPr - Dead SMC?


New member
i only get green light if i use a fresh charger that has been used with a known working board before hand. if i unplug then replug i dont get green light.

corrosion next to SMC, C6992 - 16v probably have shorted SMC_ONOFF_L.

i then cleaned the corrosion, i haven't clean the SMC. no IPA went inside the SMC.

if reflow the SMC doesn't work then i will need to replace the SMC.

PPBUS_G3H: 12.27v - should be higher - so this indicator a dead SMC
PP3V42_G3H: 3.4V

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Staff member
Is SMC_RESET_L high?

I would reflow the SMC first and see what happens, if SMC_RESET_L is high. SMC_RESET_L has to be high for the SMC to turn on. Make sure to remove the edge bonding and don't let any get stuck under the chip.


New member
this board was too easy, reflowed the SMC and it worked!

no other place has corrosion.

passed all ASD... ok move on to next board.