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Hello, I have recently fixed mac that has been broken for over a year. Now I have a problem with the battery. It's stuck at 1% and mac will not work without being connected to charger.
Question: Do I check if there is anything else or is the battery dead and I just need to replace it ?
Traces look, fine, I have connection from U8400 to R8402. R8402 is the one I had to solder on a broken pad, but I checked and it has connectivity both ways and it's not touching GND anywhere. Seems like 12V goes from F8400 > R8400 > R8401 > R8402 > U8400 but it's not switched to GND...
I've put it back together, everything works except the backlight - keyboard, trackpad, screen, system boots if I light external light to it I can log in etc.
Seems like U8400 is not being told to turn on the backlight and not drawing down the voltage on R8400 - Q8400  ?
Maybe the enable...