820-00840 Camera not detected - liquid damage

it-solve

Member
Slight liquid damage, after clean all working fine except the camera.

Diagnostic says there may be an issue with the camera. Not sure if that means detected by problematic signals or not detected at all.
Not detected under System Report


PP5V_S0_ALSCAM - 5.1V
PP5V_S0_ALSCAM/PP5V_S0_ALSCAM_F - 5.1V
ALS seems to be responding - adjusting screen and kbd bcklt brightness

Checked L4007/09/10 coils seem to be fine
L3901/2/3/4 - voltages are correct
No physical/liquid damage around any of those
Slight liquid discolouration around C3928 of U3900, but voltages seem fine.
 

2informaticos

Administrator
Staff member
Possibly U3900 affected by corrosion.
Did you check L4080-85 too (page 37)?
Do you get all power lines from page 36?
 

it-solve

Member
u3900 is underfilled chip, cant reflow. Poked the components around which are not underfilled and seem to be solid.
Did continuity test on those L4080-85 too, also no corrosion in the area.

PP1V35_CAM - 1.39V
PP1V8_CAM - 1.78V
PP1V2_CAM - 1.20V
PP1V2_CAM_XTALPCIEVDD - 1.19V
CAMERA_PWR_EN - 3.28V
CAM_TEST_OUT - 1.285-1.289V
 
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