Acer Aspire 3750 - USB Failure

Troubleshooting 4-11
USB Failure 0
If the USB fails, perform the following, one at a time. Do not replace a non-defective FRU:
Figure 4-8. USB Failure
USB 3.0 device must be plugged into the USB 3.0 connector. USB 2.0 connector
does not support it.
Start
No
Check USB board to
MB cable
Re-assemble USB
board cable to MB
NoCheck USB board?
Swap USB board
and USB cable
Replace M/B