Blackmambo90
Member
Hello everyone!
Have a weird issue on 2019 macbook air:
It does power on, however there is a question marc and while try to online restore the os – no success. It’s either stop on the downloading stage or during the installation. It once even got to the point where it ask you for the language but then it frizzed there. Tried DFU restore – goes well but does nor reboot after its done and shows padlock.
No liquid damage on the board, look clean and like no one played with it.
However I noticed that the led (D6959) on the board is not lighting up. After short troubleshoot I found that the led polarity are inversed I presume from factory?! Removed and placed it in the right direction, does light up now, however its dim and get only 2.3v and should be 2.7v if I am not mistaken. R6959 get 3.29v on PP3V3_G3H_RTC should be more as well I guess?
Have the voltage on all coils except the one for CPUGT witch I presume is normal since there is no load on gpu.
Notes:
Battery is charging.
Does see usb key if plugget but obviously does not boot from it.
After disconecting and reconnecting the battery, does not power on. Need to plug the charger and after that will power on (from buttery or charger), not sure if thats normal.
Will appreciate any hints.
Thank you!
Have a weird issue on 2019 macbook air:
It does power on, however there is a question marc and while try to online restore the os – no success. It’s either stop on the downloading stage or during the installation. It once even got to the point where it ask you for the language but then it frizzed there. Tried DFU restore – goes well but does nor reboot after its done and shows padlock.
No liquid damage on the board, look clean and like no one played with it.
However I noticed that the led (D6959) on the board is not lighting up. After short troubleshoot I found that the led polarity are inversed I presume from factory?! Removed and placed it in the right direction, does light up now, however its dim and get only 2.3v and should be 2.7v if I am not mistaken. R6959 get 3.29v on PP3V3_G3H_RTC should be more as well I guess?
Have the voltage on all coils except the one for CPUGT witch I presume is normal since there is no load on gpu.
Notes:
Battery is charging.
Does see usb key if plugget but obviously does not boot from it.
After disconecting and reconnecting the battery, does not power on. Need to plug the charger and after that will power on (from buttery or charger), not sure if thats normal.
Will appreciate any hints.
Thank you!
Last edited: