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I have an 820-01700 that had corrosion under U3100 CD3217. Replaced IC and now device pulls 5v at .3 Amps on charger alone. PPBUS gets 12.3v. When connected to battery, it turns on and boots up to desktop just fine but does not charge. Ammeter reads 20v 0. amps with battery connected...

Got an iMac that thunderbolt is not working. Opened up iMac and discovered a noticeable burn in the thunderbolt IC U2800. The part number is DSL3510L and I have this same IC on a donor 820-3437 MBA L2013. My question is, is it even possible to replace the Thunderbolt IC, or is the firmware...

A1990. External display works normally when eDP is unplugged. With eDP connected looks like this. Potential gmux issue? No signs of screen damage. Have yet to work on this model yet.

Device came in liquid damaged and had missing R701 to CPUVIN and RA603 to PPVIN_S0_GFXIMVP_VIN. Replaced and device boots up normally now. Performed a QC test and gave USC. Everything was working normally with board loosely installed. After screwing down logic board screws to frame, The touchbar...

MacBook came in with a swollen battery a few months ago and not holding a charge. Replaced battery and sent customer on their way. Customer comes back a 2 months later with the replacement battery no longer holding a charge and only had 1 cycle count. Considered it a defective battery and...

MacBook Air came in for no power. No signs of liquid damage. All G3H and S5 rails present. Hooked up to DCPS and drawing 0.027Amps. Pulled board out and discovered the 25MHZ Clock Crystal Y1905 had exploded. Replaced Y1905 and Replaced u1900 RTC Clock since it was next to the clock crystal...

Currently working on a 820-3437 where power supply is pulling .02Amps. Device has no signs of liquid damage. Always present power rails are present. SMC_RESET_L is present. PM_SLP_S4_L is missing. Board does not boot in SMC Bypass. I discovered the tiniest amount of corrosion under SMC on Pad 64...

I have an 820-3662 board that came in today for random shutdowns. After researching here on the forums, it looks like random shutdowns are a very common issue with this board and mostly pertain to a video issue. I am not sure if the issue with this computer is related or not but here are the...

Couldn't really find the appropriate list to put this under but thought this was as close as it got. Something we've noticed lately, and wanted to see if anyone else did as well, was when we've been installing High Sierra it seems like the microphone no longer works. This has happened on...

820-4924 came in with no signs of liquid damage and no power on and no mag light. I left the board alone for 2 days while I worked on other repairs, and by the time I got to the board, I first plugged in magsafe and got a orange light. Light disappeared after a few seconds. I then removed...

820-00165 came in with no sign of damage or liquid damage with no power and no light on MagSafe Charger. PPDCIN_G3H = 16.5V PP3V42_G3H = 0.3V. Diode mode reading full short on PP3V42_G3H. Applied IPA on underside of board, injected 1.8V 1A power on PP3V42_G3H and noticed the SMC (U5000) was...

I currently have 3 Mid 2012 13' MBPu that all have 820-3115 boards with the exact same issue. The symptoms are: Random shutdowns Graphical Anomalies Before shutdown, Missing RAM Beep, even with RAM installed I have replaced RAM on all units with the no progress. Interestingly enough, I...

Client brought in device after device was liquid damaged. Noticed a build up of corrosion around U6903 which appears to be where PP3V3_G3H is created, and a blown Diode D6902. First thing I did was give device an ultrasonic cleaning to remove the corrosion to get a better look. After which, I...