Procedure 1 External Device And Connection Check; Procedure 2 Replace System Board - Compal JHT01 Service Manual

JHT01 Service Manual
To determine if the computer's external USB devices are functioning properly,
perform the following procedures. Figure 6-5 outlines the process. Start with
Procedure 1 and continue as instructed.
• Procedure 1:
• Procedure 2:
6.1 Procedure 1
The USB device may be damaged or the connection may be faulty. Perform
Check 1.
Check 1
Make sure USB device cable is firmly plugged into one of the USB sockets.
• If the cable is connected correctly, go to Check 2.
Check 2
Plug the USB device into another USB socket (there are three in all).
• If the USB device still does not work, go to Check 4.
• If the device functions correctly when connected to another USB port, go to
Check 3.
Check 3
Make sure that the USB socket is firmly secured to the system board of the
computer.
• If the malfunction remains, the system board may be damaged. Go to
Procedure 2.
Check 4
Connect an alternative USB device to one of the computer's USB ports, and then
boot the computer. The computer automatically detects the external device.
• If the alternative USB device works correctly, the original device may be
damaged and should be replaced.
• If the alternative USB device appears to have the same problem as the original
device, the system board may be damaged. Go to Procedure 2.
6.2 Procedure 2
If the error persists, the system board may be damaged.
6-16
External device and connection check
Replace system board
External device and connection check
Replace system board