Maintenance Manual

2.7 External USB Devices Troubleshooting 2 Troubleshooting Procedures
2.7 External USB Devices Troubleshooting
Replace system board
(Procedure 2)
END
O riginal U SB
device is faulty
Perform external device and
connection check
(Procedure 1)
START
D oes the device function
when connected to a
different USB port?
D oes an alternative U SB
device function correctly?
No
Yes
No
Check USB port
connection
Yes
Figure 2-6 External USB device troubleshooting process
Satellite P20-25 Series Maintenance Manual 2-19