820-02020 don't switch off lcd when closed

[bartech]

when close screen macbook dont switch off lcd. check on different top case and the same.

 

[2informaticos]

Inspect UR200 area for corrosion.
Check AMR_LEFT/RIGHT_OR_ND_1V8 and IPD_LID_OPEN_1V8 signals behavior.

 

[bartech]

i disconect power button and macbook start to switch off lcd when closing, whit other button connected lcd dont switch off

 

[bartech]

ur200 looks ok but i change it and for another one but the same

 

[2informaticos]

Did you check how its signals react?
I didn't suspect UR200 itself.

 

[bartech]

how to chceck it? its on other side of motherboard. Whit magnet? lcd need to be connected?

 

[2informaticos]

No need to connect the LCD.

You can test left sensor JR200 with a magnet.
Is not so easy with right sensor, placed on right speaker area.

 

[bartech]

i chek whit magnet amr left whit magnet go to 0v, whithout there is 1,8v
the same whit arm right 1,8v - 0 v whit magnet

IPD_LID_OPEN_1V8 - nothing happening stay at 1,8v all time

 

[2informaticos]

Check the traces to UR200; if both inputs are low (0V), output must go low too.

 

[bartech]

traces look ok i even take out ur300 & ur200 and there is connection. i put back ur300/200 and the same no switch off lcd when closed

 

[bartech]

i check whit magnet when its workin on top case and it switch off but magnet need to be strong. when i close not for 100% and use magnet on jr200 side it switch off