Hello, my MacBook Pro (820-02773 - A2338 M2) suddenly died and was not water damaged.
This is my own macbook and this is my first repair attempt (previously repaired ipads, tablets and consoles which had damaged ports or visible faulty capacitors etc.) I have thermal camera, hot air station, microscope and micro soldering station.
I have schematics and board view of the logic board.
The usb-c amp switches to 20v and then reboots in a loop instantly. Both the port have the same behaviour. Pressing power button nothing happens, touchpad is also not responding, but keyboard Works because i can enter DFU mode. Tried to recover/revive with Apple Configurator but after the apple logo it shows error "Unexpected device state 'DFU' expected 'RestoreOS' (4014)". After apple logo disappears backlight is still on for about 30 seconds and then it turns off too.
Charging battery works in DFU mode.
Removed logic board, under thermal camera L5800 is hot (i can upload picture if needed).
PPBUS_AON is fluctuating between 12V-12.4V (diode mode reads 0.440 instead of 0.496)
3V8_AON is present, 3.8V stable. PP3v8AON_PH1, PP3v8AON_PH2, PP3v8AON_PH3, PP3v8AON_SW2, PP3v8AON_SW3 are 3.8V, PP3v8AON_VSW1 is pulsing between 3,4V-3,9V.
5V is present and steady.
PP2V5_AWAKE_NAND 2.58V looping.
Can't find any short.
I've inspected the board under microscope, Q5840 might have a crack on the top but not completely sure. might be a scratch, i can see only at the top but not at the sides (i can upload pictures if needed).
Please help me.
Thank you.
This is my own macbook and this is my first repair attempt (previously repaired ipads, tablets and consoles which had damaged ports or visible faulty capacitors etc.) I have thermal camera, hot air station, microscope and micro soldering station.
I have schematics and board view of the logic board.
The usb-c amp switches to 20v and then reboots in a loop instantly. Both the port have the same behaviour. Pressing power button nothing happens, touchpad is also not responding, but keyboard Works because i can enter DFU mode. Tried to recover/revive with Apple Configurator but after the apple logo it shows error "Unexpected device state 'DFU' expected 'RestoreOS' (4014)". After apple logo disappears backlight is still on for about 30 seconds and then it turns off too.
Charging battery works in DFU mode.
Removed logic board, under thermal camera L5800 is hot (i can upload picture if needed).
PPBUS_AON is fluctuating between 12V-12.4V (diode mode reads 0.440 instead of 0.496)
3V8_AON is present, 3.8V stable. PP3v8AON_PH1, PP3v8AON_PH2, PP3v8AON_PH3, PP3v8AON_SW2, PP3v8AON_SW3 are 3.8V, PP3v8AON_VSW1 is pulsing between 3,4V-3,9V.
5V is present and steady.
PP2V5_AWAKE_NAND 2.58V looping.
Can't find any short.
I've inspected the board under microscope, Q5840 might have a crack on the top but not completely sure. might be a scratch, i can see only at the top but not at the sides (i can upload pictures if needed).
Please help me.
Thank you.