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
R eplace system board
(P rocedure 2 )
END
Original USB
d ev ice is fau lty
P erform ex ternal device and
connection check
(P rocedure 1 )
START
D oes the device function
w hen connected to a
differen t U S B p ort?
D o es a n altern a tive U S B
device function correctly?
No
Yes
No
Check USB
port
con nection Yes
Figure 2-5 External USB device troubleshooting process