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Hi, I have a problem with a 2012 Macbook A1286, I replaced the battery and installed an SSD for the customer then the customer started having random shut down issues. I have now replaced the battery 3 times, all aftermarket but from different reputable suppliers that I have used for years...

I have changed Q7030 & 40 and no change except there is now 1. instead of a beep between F7000 & R7020 and PP3v3_G3H now has 0.15v.

Just rechecked everything to be sure, power supply not connected at all. Diode mode readings are all "1 . " with red probe on a screw hole and black probe on point. It will be next week sometime before I can change Q7030 & 40 because I have to order the components in.

Sorry, readings were all OL diode mode so thought the actual readings would be mroe helpful. So yes, I think there is a short? This is where I'm still new to everything and to what to do next, If i put one probe on F7000 G3H and one on R7020 pin 2, PPDCIN_G3h_ChGR I get a short (a beep).

Hi, Yes I get a specific and constant 5.02v on every point for PPBUS_G3H according to open board , specifically: F7000, R6700, F84000, CD770, CD771. PPDCIN_G3H gives 5V at F3000, CD720, R7015, R7071. For the resistance multimeter set at 2k ohms: L6900: .381 & .389 L9080: .411 & .412...

Hello, I will start this by saying I am VERY new to logic board repair, I know basics and learn best by doing but have found this difficult as I can't find my exact problem and just chunks of it which makes things hard to track for me. It's a Macbook Air 2019 A2159 820-01598. It was...