2.6  External USB Devices Troubleshooting  2  Troubleshooting Procedures 
2.6  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 2-5 External USB device troubleshooting process 
Satellite A70 Series Maintenance Manual  2-17