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i just flashed another bios nothing changed unfortunatelly

its very old model and i hope someone have this problem in experience. i hope you have some ideas about this problem 2informaticos thanks in advance

yes i checked lio boar disconnected also of course. very important thing what i missed to detect and write here. fisrt boot is normal have chime and fan is rotating normaly after several seconds fan stops rotating and macbook is like turned off but ppbus_g3h have 8.4v. with and without LIO board...

yes i tested this lcd on another macbook and also another lcd on this macbook. now i changed u9701 and nothing changed. exactly same problem remained.there is not any corosion

so i tried like this 1) without LIO board connected BKL_EN have 2.6v and BKL_PWM have 3,3v. after several second backlight goes off and both voltages dropping to 0v 2) with LIO board connected BKL_EN have 2.6v and BKL_PWM have 0v.

to check BKL_EN and BKL_PWM display must be connected yes ? and also lio board must be connected ?

what i tried already 1) pram reset 2) tried another lio board and flex cable but nothing changed

1) so. without LIO board connected SMC_LID have 3v and backlight present after about 5-6 seconds backlight dont have but 3v still present. 2) withi LIO board connected always havr 1.1~1.3v and no backlight at all

hello. have 820-3023 with backlight problem.when flat cable of I/O board is discconected have backlight several seconds. whats should be problem? thanks

i checked and not same layout. so not same. but i dont have ipad m2 models layout maybe same. need to check that also. do you have any source fron where can i buy this ic ?

but m1 pmu maybe isn't interchangeable to m2 yes ?

if anyone know, from where can i get u8100 for this board. can i take it from another model? 343S00554

PP5V_MPMU_BSTLQ_XW 458/468

do you mean page 38 of the shematic?

good board/faulty board format PPBUS_AON 12.28v 480/480 PP3v8_AON 3.8v 157/322 so in this line bad board have high value not low! PP3v3_S2 0v 402/401 P3V3S2_SW 0v 402/301 P3v3S2_EN 0v 703/701 PP1V8_S2 0V 336/336...

thanks for info. i just bought that sw. so damaged capacitor was c8430. PP5V_MPMU_BSTLQ_XW. and now this line have 2.2v instead of 5v. i think its u8100 problem.can you advice me something else? 1) PPBUS_AON 12.28v 2) PP3v8_AON 3.8v 3) PP3v3_S2 0v 4) P3V3S2_SW 0v 5) P3v3S2_EN...

A2338 M2 820-02773 5v 0.02ma. no any liquid damage, board is in pristine condition. i don't have any history of the macbook. i opened it first time.i don't have brd and shematics for this model. couldn't find on web. first i did visual inspection and i found blown capacitor and i checked and...

if anyone have donor/icloud locked board and helps me to identify parts by marking code will be great. in my case ic is burnt and can't identify thanks

hello dear members i have in hand Macbook Air 13 inch with M2 chip 2022 year 820-02536-09 water damaged only 5v main problems: 1)i can't find shematic and brd for this model. 2) i don't have donor board for this model if any one have any of them please help me to find out name and values of...

after that when without disconnecting charger after trigger PM_PWRBTN_L goes to 0 volts and than again 3.4v