820-2850 not going to sleep when closing lid.

[Yoel Ren]

this board came in with classic c9560 problem ( crashing intermittently ).
after c9560 problem, customer came a few weeks later with not going to sleep when closing the lid problem.
smc_lid is 3.4v.
using another known good logicboard in the case, the sleep work, so we can discard part problem.

everytime i plug magsafe, u8000 isgetting warm, and sometimes theres a fan spin ( even though i dont press / trigger power button ).
any idea where to look for ?
is the keyboard button stuck hence mac wont go to sleep?

 

[Yoel Ren]

r8750 is corroded, re tin the resistor, value is normal. but still same.

 

[2informaticos]

Hall sensor is placed into BIL, connected to J6955.
Check R6961.

 

[Yoel Ren]

r6961 is good, there's 3.3v at both side.

 

[2informaticos]

Should drop to 0V, when lid is closed.
You can test approaching a magnet to the sensor placed on the BIL.
If another MLB worked on the same shell, then the sensor is good.

Should have bad trace, or contact problem at J6955.
Don't forget to check 3V42_G3H contacts...