820-01041 wake up problem

[bartech]

after battery change after some time there was short on J6951 and after that when you close laptop and opel lcd dont wake up, mac work there is sound and touchbar is woking.
i change j4800 and j4801 but still the same.

 

[2informaticos]

Check U4802 signals, with lid open/closed.
Use magnets to simulate the lid position...

 

[bartech]

when i get magnet volts go to 0v left and right work like that

 

[2informaticos]

IPD_LID_OPEN signal also reacts correctly?

 

[bartech]

yes but sometimes nedd some time to change to 0v, one time i use only one magnet and go to 0v on left and right

 

[2informaticos]

If machine has sound and working touchbar, it wakes up.
You may have problems only with image, or backlight.

 

[bartech]

still same, i check and found that you cant change brightness i try to change on touchbar but nothing change stay as same brightness.
When it put screen to sleep and switch off i can wake it up by power button and it wake up the screen

 

[bartech]

now no backlight i change u8400 and nothing change