External Usb Devices Troubleshooting - Compal JHL90 Service Manual

JHL90 Service Manual
6.

External USB Devices Troubleshooting

START
Perform external device and
connection check (Procedure 1)
Does the device function
Check USB port
Yes when connected to a
connection
different USB port?
No
Original USB
Does an alternative USB
Yes
device is faulty
device function correctly?
No
Replace system board
(Procedure 2)
END
Figure 6-5 External USB device troubleshooting process
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