Reference number: CH000277

Basic floppy disk drive troubleshooting.

Issue:

Basic floppy disk drive troubleshooting.

Cause:

A floppy drive may not work because of one or more of the below reasons.

1. Bad floppy diskette.
2. Not setup in CMOS.
3. Confliction with other hardware.
4. Not connected properly.
5. Bad drivers.
6. Bad hardware.

Note: This document is referring to floppy disk drive issues; if you are having problems reading diskettes, please see document CH000579.

Solution:

Bad floppy diskette

Verify that the floppy diskette that you are attempting to read from is not write protected or bad. Verify that the diskette is not write protected by sliding the tab into the position not allowing light to shine through it. If you do not have a tab place tape over this hole.

Because of the technology of floppy diskette drives, it is likely for a floppy diskettes to easily become bad. Verify that other floppy diskettes are not exhibiting the same issue.

If other floppies work it is likely that you may have a bad floppy diskette.

Not setup in CMOS

Verify that the floppy drive is properly setup in CMOS. If the floppy drive is not setup properly you may experience read / write errors or the floppy may not work at all. Most computers need to have the floppy setup as a 3.5, 1.44MB.

• Additional information about how to get into CMOS setup can be found on document CH000192.

Confliction with other hardware

If you have recently physically installed any new hardware such as a tape drive or other backup medium, temporarily disconnect that new hardware to ensure that it is not the cause of your floppy drive not working.

Not connected properly

• Power down, unplug, and open computer, being aware of ESD and its potential dangers.
• Verify that the floppy connection is connected to the motherboard FDD connector. If it appears to be connected, disconnect and reconnect cable to verify cable is seated properly.
• Verify that the floppy cable coming from the motherboard is connected to the back of the floppy drive. If connected, disconnect and connect the floppy drive cable to verify seated properly.
• Verify that a power connection is also connected to the back of the floppy drive.

• If your floppy cable has more than one connection, verify that you have connected the floppy to the appropriate connection. The above picture illustrates what drive should be connected where.

Bad drivers

If you are not able to read or write to a floppy diskette from Windows, verify that the computer is not exhibiting floppy drivers issues by testing the floppy drive from MS-DOS.

If you are running Windows 3.x click File and click Exit Windows to get to an MS-DOS prompt.

If you are running Windows 95, Windows 98, Windows ME, Windows NT, Windows 2000, or Windows 2000 click Start / Shutdown and restart the computer to a MS-DOS prompt.

Once at the prompt, place a diskette into the floppy disk drive and type format a: if you get:

Invalid media or Track 0 Bad = Attempt to format another floppy disk.
Write Protect Error = Ensure that the disk is not write protected by removing the floppy disk and insuring that you cannot see through both holes; if you can, move the tab in the left hand side down (looking from the back of the floppy) and try again. If the disk is not write protected try another floppy disk.
Invalid drive specification = Ensure that you floppy drive is setup properly in CMOS.

If the floppy disk drive formats properly in MS-DOS but does not format in Windows, it is likely that Windows or a program within Windows is preventing the floppy drive from working. Attempt to End task all running TSRs by following the step on document CHTSR. If you continue to experience the same issues we recommend that Windows be reinstalled.

Bad hardware

If you continue to experience issues after following the above steps it is likely that hardware within the computer is bad. Attempt to replace the following hardware in the computer in the below order.

1. Replace the floppy data cable which connects the computer floppy drive to the motherboard \ I/O board.
2. Replace the floppy if the floppy data cable did not resolve your issues.
3. Replace or request that the motherboard \ I/O board be replaced.