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To be specific, inline voltmeter shows 5V and pulses between .13A and .18A.
Using schematic/boardview for 820-02935.
Only need data.
Was run over by a skid steer. Most visible damage is to display assembly. Top case is not bent. Logic board is not bent.
No visible damage to logic board...
Most of corrosion was present around USB-C controllers and charge controllers (U500, UF400, UF500, UF000, UF100), and capacitor block near UF900, UF930, and UF960.
Only found a couple legs/pads corroded enough to cause a possible connection problem (UF960, UF900). Was able to clean them up and...
Had water spill and would not power on. Most corrosion was right around SMC IC U4900.
After cleanup powers on automatically when battery attached, or without battery attached powers on when adapter connected to DC jack. This is with or without keyboard connected.
When on, system boots and...
Same symptoms with exact model donor display.
Have been troubleshooting the backlight circuitry for days and even replaced the driver IC a couple times. All voltages look good but no 12v to 40v boost.
I DO get a backlight and video output with a donor 13" A1502 screen attached. Obviously all...