I have a 820-3115b here with no power and no green light on the charger
pp3v42_g3h is present as is ppvrtc_g3h, ppbus_g3h is 12.23v, pp5v_s5 & pp3v3_s5 are missing this is because SMC_PM_G2_EN is missing. Board is pulling only 13ma from the charger. I'm guessing bad SMC.
Board was originally liquid damaged (can't remember exactly where as this was probably 2 years ago) and PPVOUT_SW_LCDBKLT was shorted to ground internally in the board, I dug the board out to clear the short and ran a jumper and the board seemed to be working fine. Installed the board in a macbook and left it installing OSX overnight, came back in to morning to find the keyboard no longer worked, replaced u5701 with no change and then decided it was a SMC issue (Can't remember why I thought this) and proceed to rip a pad off the only spare SMC I had so the board sat in a pile until recently when I had a spare SMC, reballed and installed this and still no keyboard. Resoldered u7501, no change. Cleaned and reseated the keyboard ribbon only to find the macbook would no longer power on
pp3v42_g3h is present as is ppvrtc_g3h, ppbus_g3h is 12.23v, pp5v_s5 & pp3v3_s5 are missing this is because SMC_PM_G2_EN is missing. Board is pulling only 13ma from the charger. I'm guessing bad SMC.
Board was originally liquid damaged (can't remember exactly where as this was probably 2 years ago) and PPVOUT_SW_LCDBKLT was shorted to ground internally in the board, I dug the board out to clear the short and ran a jumper and the board seemed to be working fine. Installed the board in a macbook and left it installing OSX overnight, came back in to morning to find the keyboard no longer worked, replaced u5701 with no change and then decided it was a SMC issue (Can't remember why I thought this) and proceed to rip a pad off the only spare SMC I had so the board sat in a pile until recently when I had a spare SMC, reballed and installed this and still no keyboard. Resoldered u7501, no change. Cleaned and reseated the keyboard ribbon only to find the macbook would no longer power on