Toshiba PORTEGE M400 - Manual (Page 82)

2 Troubleshooting 2.5 USB 3.5” FDD 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 CN4610 (port 6),
CN4611 (port 4) or CN4612 (port 0) of the System board.
If the connection is 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 Replace the System board with a new one following the steps in Chapter 4,
Replacement Procedures.
2-34 [CONFIDENTIAL] PORTEGE M400 Maintenance Manual (960-541)