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Board slowly spins fan to max, draws 6w. SMC bypass still draws 6w but fan spins up faster. ALL S5, S3, S0 on 5V and 3v3 are correct voltage (5.91, 3.85) as are G3H(9.5v) and 3V42. PP1V05_S0 and PP1V5_S3RS0 are 1.2 and 1.73v respectively. PPVCCSA_S0_CPU is 1.04v, but both PPVCORE_S0_CPU and the...

Board has good PPBUS_G3H(14.6v) and 3V42(3.92v) 5VS5, S3, and S0, as well as 3V3 S5, S3, and S0 are all good, at 5.87 os 3.86v. When power applied board draws about 6w but does nothing, no fans. In SMC bypass, fans run and board draws about 8w. GPU_VCORE fluctuates slightly around 1v...

Board spins fans at max when power connected. And draws about 35w from wall. CPU VCORE is about 1v and PP3V3_S0GPU is 3.5V. No display, USB ports have power but no usb activity. I believe this might be a VGA coil short because I read that if L8920 has less than 4 ohms to ground it indicates a...

Board has no sign of life, but does spin fan max speed in SMC bypass mode. But even in this mode it has no sign of life- no display etc. No shorts on any 5V/3.3V rails. G3H voltage 13.33V. Draws 0.6 watts in when plugged in (no fan) and 5W when plugged in and in SMC bypass mode (full fan). SMC...

Board symptoms- No sign of life at all. No shorts on any 5V-3V3 S5, S3, S0 rails. No fan spin even when attempted SMC bypass. G3H voltage 13.23V. Draws about 1 watt from wall in regular or SMC bypass mode.

Board symptoms- Fan runs max speed when plugged in no matter what. But no backlight or display, no activity when USB is plugged in, even in SMC bypass. All S5-S0 5V and 3.3V rails are good so suspecting CPU failure. This one had no sign of life at all until I replaced C1768 which had broken...

Hi I have a 2010 13' Unibody that will power on and run fine when a charged battery is connected but it does not run at all when just connected to the adapter nor does it charge the battery. Obviously this rules out G3H as having any problems and also the PP3V42_G3H does have 3.65 volts but...

Have a pro 2012, board 820-3115. No boot or sign of life except the green charger light. No visible board damage. G3H shows 13V and PP5V_S5 shows 5.3V, when board plugged in. PP3V3_S5 shows 3.47V. However, the S3 and S0 lines are dead for 5V and 3.3V. The only short I have found is a dead short...

Fixed a 2011 11in A1370 today that had a bad capacitor. But then realized it had an EFI lock :( bought it on facebook so can't guess the password, and the seller removed their original SSD. I do have a lot of working A1370 donor boards, but they all have i5/2GB memory, whereas this laptop has...

Damage on A2141. I got this laptop for $80 and it's perfect condition physically but has bad water damage on both "chicken wings" of the board. See photos. Everything in the center (cpu/gpu/t2) look good. Cleaned the board and reflowed as many chips as possible without messing anything up. Now...

Hi everyone, I am a high school student and i am running a MacBook repair business in my free time. I have only recently gotten started on some board level repairs and have a few boards that I haven't been able to figure out. I have the boardview for this A1502 laptop and a schematic for...