Toshiba Satellite R10 Maintenance Manual page 89

2 Troubleshooting
Procedure 3 Connector Check and Replacement Check
The USB FDD connector may be disconnected from the connector on the system board.
Check visually that the connector is connected firmly.
Check 1 Make sure the USB FDD cable is firmly connected to the CN4611 (port 3) or
CN4610 (port 0) of the system board, or CN4620 (port 5) of the CN board.
If any of the connections are loose, reconnect firmly and repeat Procedure 2. If
there is still an error, go to Check 2.
Check 2 The USB FDD may be defective or damaged. Replace it with a new one. If the
FDD is still not functioning properly, perform Check 3.
Check 3 When the USB FDD is connected to CN4620 (port 5), connection between the CN
board and the system board may be loose. Reconnect the cable between them
firmly. If the FDD is still not functioning properly, perform Check 4.
Check 4 When the USB FDD is connected to CN4620 (port 5), the CN board may be
defective or damaged. Replace it with a new one. If the FDD is still not
functioning properly, perform Check 5.
Check 5 Replace the system board with a new one following the steps in Chapter 4,
Replacement Procedures.
Satellite R10 Maintenance Manual (960-509)
2.5 USB 3.5" FDD Troubleshooting
2-35