"You can check its reaction aproaching a magnet; pin 25 should drop to 0V."
Of course, this doesn't help if you don't get first 3V on the signal; in normal mode, lid open.
Remove R5257 and check voltage on its pad 1 (going to pin 25 of J6600).
In this way you can see if problem comes from audio flex, or MLB.
Of course, this doesn't help if you don't get first 3V on the signal; in normal mode, lid open.
Remove R5257 and check voltage on its pad 1 (going to pin 25 of J6600).
In this way you can see if problem comes from audio flex, or MLB.