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I've got an A1502 (820-3476) that had some liquid damage around the top edge of the board. After ultrasonic cleaning and replacing the ISL6259 PPBUS was restored (12.57V). With several known good 85W real MagSafe Adapters and DC-In boards the board only gets a green light that does not change...

All PM_SLP_(S5, S4, S3, S0)_L are missing. PPBUS_G3H is 8.61v, PPVRTC_G3H is 3.33v, PM_DSW_PWRGD is 3.412v. We're using a real 85w MagSafe. Board suffered liquid damage, but sadly this is all we know.

I have a liquid damage 820-3787 that gets Green Light, No Fan Spin. The corrosion seems to be focused around the IO Board Flex Cable Connector J9510. I've investigate the U7501 area pretty closely as well as the U1950 and U6100 areas as this board is missing PM_SLP_S4_L. PPBUS: 12.57V PPVRTC...

This board came in with liquid damage around the ISL and TPS chips. After repairing the obvious liquid damage the computer got a green light, fan spin, and three beeps. I noticed this capacitor had exploded and part of it was up under the edge of another RAM module. My board view for 00138 seems...

This board came in with signs of prior repair around the SMC, and U4000/U3900. After removing remainging underfill and properly reflowing the SMC, the unit powered on chimed once and then shut off. PRAM resets would not work, SMC resets would. I tracked it down to a BIOS issue the original BIOS...

I have a 2015 A1398 that came in with no signs of liquid damage or other physical damage. The computer powers on and passes Apple built in diags. The computer will load up and about 80% through the loading progress bar then the screen goes black and reboots. The heatsink gets incredibly hot when...

This computer had the GPU cap problem. I replaced the cap with the larger capacitor and verified that the repair was working and the GPU passed stress testing. I then put the board in the ultrasonic to clean of the leftover flux, after the cleaning process the computer only chimes and POSTs with...

Got a board in that has no signs of physical or liquid damage. I get proper 12.58V on PPBUS. After plugged into the MagSafe the TPS IC U7501 gets extremely hot. I replaced the U7501 as well as the 2 MOSFETs and the shorts on the 3v3 rails was removed. However even after replacing those...

Got this unit in, no signs of liquid damage, however one of the WIFI antennas was allowed to get in between the bottom case panel and the JTAG connector and visibly crushed the connector. I have removed the villainous JTAG and have noticed that over time to the CPU gets warm and almost to...

This board is a potential refurb for a business client. The only history I have on it is that the screen is cracked and that there is "No Display". Upon further investigating the unit gets a green light and fan spin but does not POST. The computer spins up runs for about 30 seconds and then...

Have an A1466 that doesn't come out of sleep when on battery alone, at least more frequently than on charger as well--have not observed it while on charger. Reballed the SMC. Passes ASD OS with no issues. When the unit tries to come out of sleep, it just hangs with a black screen and active...

I suspect this unit is the victim of a cheap Chinese charger, bad dorm room wiring, etc. Came in with no green light / no power. R7051 was blown, replaced the resistor and ISL. Got green light back, however after a few seconds it cuts off, and then a few seconds letter will come back on...

The board has a history of water damage showed up very corroded in the top edge of the board. The backlight circuit was hit the hardest. After cleaning the board gets a green light and fan spin however there is no chime, RAM beeps, or light on USB mouse. The CPU gets slightly warm after being...

[SOLVED]820-3476 PPBUS_G3H 14v. Have charger green, orange light, fan spin, and chime. I have an 820-3476 with an unusually high PPBUS_G3H at 14 volts. I've checked R7121 and R7122, both are fine. Before I started having trouble with PPBUS_G3H I had a blown U7700 that I replaced. Upon turning...

I got a diamond in the rough board in a shipment of "donor boards" today. Its an 820-3437-B that looked to be in good shape except it was missing its BIOS chip and termination resistors. For grins I pulled a BIOS chip from another board and put the missing components back on. It posts and seems...

Working on a stack of 820-3330's tonight and I have stumbled across a weird one. I had to replace the ISL as it had blown Q7030 and Q7035 MOSFETs. It came in with no power but occasionally gets a green light. When the light is on or off the PP3V42 is high (3.415 V), SMC_ACOK is 3.25V, I am...

I have a board that runs fine on battery, however I get no green light on the charger. All the power rails are there and even adapter sense but only at U6901 and U6900. There is most likely an internal short on Adapter Sense as there is no continuity from pin 5 of U6901 to pin 5 of the DC In...

I️ think I️ know where this board is headed, but I️ just want to be sure as this is a weird issue. It’s a mid 2010 13” that gets weird black blocks on the screen and other graphic anamolies, and the ram all by the keyboard is bad. ASD gives Error 60 Video Controller Failure. The problem persists...

Ive gone through the MacBook Air Backlight Repair lifeline that Louis posted however this problem seems to extend beyond the simpler solutions. The Backlight and LCD work fine most of the time, I get 3.34V on BKL_PWM and I found 2 resistors that were a little out of spec so I replaced them...

This board came back in for a warranty repair, the initial problem was surge damage no power after the storm. ISL6259 was badly burned as well as R7051 and the traces to pins 16,17, and 18 of U700 had to be replaced with wires. The problem is now the system does not see a battery inside the OS...