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2 Troubleshooting Procedures
Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual
19
Check 3 The system board may be damaged. Replace it with a new one following the
instructions in Chapter 4.
2.6 External USB Devices Troubleshooting
Replace system board
(Procedure 2)
END
Original USB
device is faulty
Perform external device and
connection check
(Procedure 1)
START
Does the device function
when connected to a
different U SB port?
D oes an alternative U SB
device function correctly?
No
Yes
No
Check USB
port
connection
Yes
Figure 2-5 External USB device troubleshooting process