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Have a MacBook that came in for a battery replacement. Device presented just fine overall. After powering on the system with the new battery installed the CPU fan runs at max speed no matter what. I've attempted another battery, I've attempted a new CPU fan and also attempted a new Trackpad &...

I have a MacBook that came in for a screen replacement. The original screen was not visibly damaged but was producing thin vertical lines in select parts of the screen. After replacing the screen there is weird artifacting that occurs in the loading screen and recovery mode screens. When loaded...

Have an 820-00840 Board. History of device is that it was working fine and then no longer powered on. System boosts to 20V when plugged in, but only draws 2-10mA. PPBUS_G3H - 13.05V PP3V3_S5 is fluctuating from 0-3.3V in a 1-2 second cycle. PP3V3_S5 is not shorted to ground. Visual inspection...

Macbook A2251 came in for liquid damage. After inspecting the board there was noticeable corrosion on the motherboard around the battery connector area. Board was ultrasonic cleaned. After cleaning a short was found on PPBUS_G3H. Injecting voltage showed U7600 was shorted. Replaced from a...

I tried finding schematics or boardviews for this one but was unable to source any. I have a blown component that matches the ones next to it labeled "1827 S6D" Next to that was a shorted capacitor that I removed but don't know the value of. Any help is appreciated. Image of board where...

MacBook A2251 Brought in because the customer was not getting image for their machine anymore. Could hear sounds but no video. Another tech in my shop attempted a screen replacement. After the replacement the device no longer gives any power up sound or display still. Current State: Just the...

Have a MacBook A2141 that was brought in for not charging/no power on 820-01700 Looking at the board there were some signs of liquid damaged around U9080 - TPS62180 This was the only noticeable area, after ultrasonic cleaning the board didn't measure short in this area. All resistances...

Have a Macbook A2179 that came in for not powering on properly. Customer stated it just stopped working and doing this. System doesn't appear to have any signs of liquid damage that can be noticed. With the battery disconnected, once plugged into power it boosts to 20V and draws around...

Working on a Macbook board that came in for no power. Stuck at 5V on USB-C Meter. No previous repairs or work done too the machine. Looking under the microscope I found PPBUS_G3H was shorted. Injected 1V @ 2A and noticed U9080 (ELC180) getting hot. Removed the IC PPBUS_G3H reads in the...

System is not powering on. a battery replacement was done about a month ago. With the board alone on the bench the voltages are as follows PPBUS_G3H - 13.07V PP3V3_G3H 3.4v PP3V3_S5 - 3.34V PP3V0_G3H 3.08V PP5V_S5 - 5.12V PP5V_S4 - 5.12V PP5V_S0 - 5.13V L7210 Has 0V so CPUCore is missing...

History: Machine sustained severe liquid damage from a pet peeing on the machine. After opening it up, numerous signs of corrosion were noticed. The board was put through an ultrasonic cleaner and then checked again with just the board on the bench. No obvious shorts on the board PPBUS_G3H -...

History: The computer will not power on. Not charging. The USB-C ports pull 5V but do not go up to 20v like they should. After looking at the board it was determined U2800 was dead. The thunderbolt IC was replaced from donor and the system is functioning as intended. System boosts to 20V on...

My shop picked up this tool and I'm curious if anyone has used it or finds it to be useful even.

Have an A1706 Logic board. 820-00923-A. When plugged in system boosts to 20V drawing around 0.55a. CPU gets hot. If left on long enough/allowed to get hot enough the fans do start spinning. No display via the screen nor via an External monitor. Using the tool U-SEM2, I find Pins 6,10, 31, 33...