Toshiba PORTEGE M400 Maintenance Manual page 81

2.5 USB 3.5" FDD Troubleshooting
Procedure 2 Diagnostic Test Program Execution Check
Insert the Diagnostics Disk in the USB FDD, turn on the computer and run the test. Refer to
Chapter 3, Tests and Diagnostics, for more information about the diagnostics test procedures.
Make sure the floppy disk is formatted correctly and that the write protect tab is disabled.
Floppy disk drive test error codes and their status names are listed in Table 2-4. If any other
errors occur while executing the FDD diagnostics test, go to Check 1.
Code
Check 1 If the following message is displayed, disable the write protect tab on the floppy
disk by sliding the write protect tab to "write enable". If any other message appears,
perform Check 2.
Write protected
Check 2 Make sure the floppy disk is formatted correctly. If it is, go to Procedure 3.
PORTEGE M400 Maintenance Manual (960-541)
Table 2-4 FDD error code and status
Status
01h Bad command
02h Address mark not found
03h Write protected
04h Record not found
06h Media replaced
08h DMA overrun error
09h DMA boundary error
10h CRC error
20h FDC error
40h Seek error
60h FDD not drive
80h Time out error (Not ready)
EEh Write buffer error
FFh Data compare error
[CONFIDENTIAL]
2 Troubleshooting
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