Hi, i have an 820-3115-B with issues on the audio Jack. The jack itself and the board look pristine.
The jack only works before playing any audio (if i plug it after playing something it will not detect). If i close/open the lid it is detected again. The audio has a ton shit of noise. The jack is receiving 3.3v. Also tried another OS installation.
I compared the diode mode on the data pins with a good working motherboard of the exact model and i got this:
Good Board / Bad Board
AUD_CONNJ1_TIP: 0.592 / 0.753
AUD_CONNJ1_TIPDET: 0.596 / 0.754
AUD_CONNJ1_RING: 0.599 / 0.755
AUD_SPDIF_OUT: 0.6 / 0.6
The jack only works before playing any audio (if i plug it after playing something it will not detect). If i close/open the lid it is detected again. The audio has a ton shit of noise. The jack is receiving 3.3v. Also tried another OS installation.
I compared the diode mode on the data pins with a good working motherboard of the exact model and i got this:
Good Board / Bad Board
AUD_CONNJ1_TIP: 0.592 / 0.753
AUD_CONNJ1_TIPDET: 0.596 / 0.754
AUD_CONNJ1_RING: 0.599 / 0.755
AUD_SPDIF_OUT: 0.6 / 0.6