Acer Aspire E1-521 - USB Failure

Troubleshooting 4-12
USB Failure
If the USB fails, perform the following:
Figure 4:8. USB Failure
Start
Swap M/B
Check USB
FFC to USB
Connect
Check USB/B
Re-assemble
USB FFC
OK
NG
Swap USB/B
OK
OK
NG
Check USB
CONN is well
Replace
USB CONN
OK
NG