82-000165 no I/O usb

[Kyle93]

Have a 820-000165 that wont recognize the usb port on the I/O board. I have tried a known a couple good I/O boards and cables. Pins on the board look perfect with no corrosion.

What to check first??

 

[2informaticos]

Check LIO connector from MLB.
Also check diode mode on data lines (PCH side).
Be sure resistors, capacitors and TVS diodes are all OK.

 

[JohnB8812]

Sounds like corroded pin or broken pin on the J9500 connector inspect closely

 

[Kyle93]

Solved. Bad soldering on replacement J9500