820-01949-07 stuck at 5v.

[zeydullak]

Motherboard 820-01949-07 stuck at 5v - 0.03A(3ports) after water damage, 1 port doesn't power up.
CD3217B12 were taken from a donor
goal: get user data
Please advise.

 

[2informaticos]

Do you mean that USB meter stays black one port?

 

[zeydullak]

One of the ports works only one side of the type-c. Pictures attached.
We found small corrosion inside the connector on the motherboard. Pictures attached.

 

[2informaticos]

Compare diode mode readings on CC1/2 lines of all ports.

 

[zeydullak]

USBC_R_CC1 - 1.61V
USBC_T_CC1 - 1.58V
USBC_W_CC1 - 0V
USBC_X_CC1 - 1.56V

USBC_R_CC2 - 0V
USBC_T_CC2 - 0V
USBC_W_CC2 - 0V
USBC_X_CC2 - 0V

 

[2informaticos]

I specified lot of times; do NOT post "V" if we talk about diode mode!

What 0V means there?
Is that short to ground, or OL?

 

[zeydullak]

Diode mode
USBC_R_CC1 - 0.7
USBC_T_CC1 - 0.7
USBC_W_CC1 - 0.7
USBC_X_CC1 - 0.7

USBC_R_CC2 - 0.7
USBC_T_CC2 - 0.7
USBC_W_CC2 - 0.7
USBC_X_CC2 - 0.16

Previous post measurements was Voltages with powered motherboard at the corresponding connectors.

 

[2informaticos]

"USBC_X_CC2 - 0.16"
Houston, we have a problem...

 

[zeydullak]

Major Tom to ground control, change the U3100_X chip ?

 

[2informaticos]

If no other bad readings around U3100_X, remove DZ3301 first.