A2442 820-02098 Sleep Shutdown

Instafixx

Active member
Macbook came in for not turning on issue.
Resistor around U5700 was shorted and replaced.
Now device turns on, but the it has developed a strange issue .
If the lid angle sensor is connected, shut down the device and try turning it on after 15 minutes. It will not turn on and the amp metre will pull only 5V 0 Amps. Unplug and replug the battery, and the device will turn on.

If the lid angle sensor is disconnected, then the device will shut down and turn on normally.

The sensor is working fine. We have checked that the customer has also replaced the LAS from an Apple service centre, but the issue still persists.

Please guide how to solve
 

Instafixx

Active member
I removed battery trackpad display and with bare board on bench. If i shut down turn the hinge that has LAS ( to imitate sleep) and the try and turn it on after sometime - device will not turn on.
S2 Rails go missing and PP3v8_AON is at 2.8V.
 

Instafixx

Active member
So JR200 is interfering with 3v3_AON. when device is shut down and lid is closed. after sometime 3v3_AON falls to 0V and never comes back up.
if board is unpowered and JR200 disconnected or unconnected wont matter.
Once board is unpowered 3v3_AON will come back up.

In failed startup state without removing board power i disconnected Jr200 and 3v3_AON still remains 0v
 
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