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First was 3 usb ports acting 5v 200mah and 1 port only 5v 36mah, i changed 2 usb controllers one side and now 4 acting 5v 200mah, without battery connected. When i connect battery after first try ports same 5v 200mah but second try with battery 20v 0.63mah steady. ppbus 12.30 cycling to 10-11...

820-01521 board working with external,internal showing only bl. tryed 3 different displays.

Board came in with no power, every port acting same 20v 0.045-0.063a. Dfu didnt work. and nothing is not heating and no sign of burnt or h20

Board came in no power, 5v 0mah, now i changed both usb controllers and get 5v 270-480mah but i noticed pp5v_G3s 1.8v and dont find problem.

First it came in with water dmg to display connector, no image at internal, but external working. Now after repairing connector and changed screen flex board boots fine to os, shows apple logo, but after boots to os display goes black. I tryed safe mode boot, everything works. But normal boot no...

Hey, first it came in no power, no sign of h20 or burn, i looked and PPBUS_G3H = 0.3v and find problem with speaker amp. now i got PPBUS_G3H = 12.3V PP3v3_G3H = 3.3V PP5V_G3S = 11.5V seems like pp5vg3s got some problem, where to look and what next

Hey, board came in with 5v and no power, i checked down to cpu cover and find l7800 is burned, changed but it goes hot and pp3v8_aon_vddmain when pluged charger going to 1v and goes hot u7700 and l7800 side. Can i change u7700 or its with cpu ?

Hey, another mess h20 board, first it was burned down screen connector, i changed them and u8400, now i have macbook booting and showing external monitor, but not reqionize internal, where to start, tryed 3 different working displays.

Where to start, comp working tryed different housing, trackpad and battery, still same, there may be issue with fan. And fan after turn on full speed

Macbook goes to 20v and no power, i noticed when i try to dfu, it goes to dfu and then restarts after 1 sec dfu, what to check. i cant get stable dfu mode.

Hey guys, board is clean, no corrosion, board stuck every 4 ports 5.07 and 10ma. ppbus is 1v ? where to start.

Another problem with 820-01521 backlight, everything works and after i shut lid panel and goes to sleep, waking up with no bl.

Got another mess board, tryed dfu restore, it restores succefully and i can see ssd at target disk, but when i try boot, it shows apple logo and half loading it goes fan max and restart. tryed 2 different working case for faulty parts but everything seems ok.

Problem with this m1, it looping and cycling 5.06 and 0.14-0.17-220mv when i watched with thermal u7700 cycling, can i change u7700 ?

It boots and powers on when i short 2 legs u8180.

Hey, first at all customer came to battery replacement, and now after changing it he comes back and battery seems dead, changed again new battery. worked 1 week and again dead, same problem is now 4 time in row, worked 1 week and battery dead. Where to find fault ? the batteries were different...

Started another project and board not working, tested all cd chips and all same voltage. ppbus 12.32, but i noticed pp3v3_g3h not 3.3v, it showing 0.200mv. Where to start. board was liquid coffe damage. cleaned all spots and changed caps what was corroded.

board working and booting fine with charger and no battery connected, but when i plug battery in it just keeps restarting and not booting correctly. what to check, what to do

Hey, got new interesting board on table, no liquid no burnt area. everything like new. Board not charging. but when using dc it turn on and working, but when i remove battery both ports 5v and 0.025A. and when battery connected 1 port is 5v and another is 20v 0a and still not charging, tryed 4...

Everything works, exept when computer starts from sleep it shows colorful display for 1-2 sec and then normal. sometimes green lines and green spots. no liquid and board seems like new.