820-4924 no power, PP5V_S3RS0_ALSCAM_F missing

[omiran]

No!i have 1.21V on pin 1 and 2. Only pin 5 reads 3V

 

[2informaticos]

Post voltage on both pins of R8178.

 

[omiran]

R8178. reads 3.32V

 

[2informaticos]

On both pins?
How don't you have 3V at U8180 input pins then???

 

[omiran]

On U8180: Pin 1 and 2 read 1.21V, Pin 3 is GND, Pin 4 the troublesome guy reads 0V and Pin 5 reads 3V.

 

[2informaticos]

At PM_SLP_S3_R_L are only U8180 and Q8131connected.
If you have 1.2V there and 3.3V at PM_SLP_S3_L, guess what???
Bad U8180, or R8178; less probably bad Q8131...

 

[omiran]

Great! Have changed U8180 though, but I guess must be a bad one still. I will try another U8180 tomorrow and give you feed back on it... have a good one champ.