820-3662 only charging with fake charger

[kevinklinkmuller]

hello there!
have solved some issues on this already. mainly it was compeltely dead, no green light and no boot.
has had water damage but im not sure if that was the cause, i have a feeling it was to do with a fake charger to begin with. anyway, to start with i replaced ISL 6259 and also both r005 and r020 were both infinite resistance.

Now it will boot with a fake charger but not with the original. the original will just pulse on and off green.
PP3v42 is pulsing of course as well. I have also noticed that there seems to maybe be leakage to ground there. its around 70 ohms to grown on pp3v42

 

[kevinklinkmuller]

just figured something else out. it's stable with an original charger ONLY if the battery is plugged in

 

[2informaticos]

Leakage on input circuit.

Post exact ohm value for R7012, measured onboard.
Do the same for R7180/81 and R7185/86.

Usually Q7180, or D7010 problem.

 

[kevinklinkmuller]

SOLVED, Q7180, realised it was slightly disoclred. thank you!!

 

[kevinklinkmuller]

Actually, I just realized while the MacBook works, as soon as i hit the power button the SMC resets (turns green) @2informaticos

I also cant use option key to boot from my own drive before startup, it does nothing

 

[piernov]

Bad keyboard most likely.

 

[2informaticos]

Check SMC_TPAD_RST_L w/ and w/o trackad flex connected.

 

[kevinklinkmuller]

thank you!! it was U4850. all sorted. Solved once and for all

 

[2informaticos]

You're welcome!
Thanks for solution feedback; some ne else can get help with it.