IBM 6648 User Guide - Page 98
Diskette drive problems, Monitor problems, Action
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Diskette drive problems Diskette drive problems Diskette drive in-use light stays on, or the system bypasses the diskette drive. Action If there is a diskette in the drive, verify that: 1. The diskette drive is enabled. Use the Configuration/Setup Utility program to check this. For more information, see "Chapter 4. Using the Configuration/Setup Utility program" on page 29. 2. The computer is checking for the diskette drive in the startup sequence. Use the Configuration/Setup Utility program to verify this. 3. The diskette you are using is good and not damaged. Try inserting another diskette if you have one. 4. The diskette is inserted correctly, with its label up and its metal shutter end first in the drive. 5. The diskette contains the necessary files to start the computer (the diskette must be startable). 6. The diskette drive cable is properly installed and securely connected. 7. There is no problem with your software program (see "Application problems" on page 91). If you cannot correct the problem, have the computer serviced. Monitor problems Monitor problems General monitor problems. Action Some IBM monitors have their own self-tests. If you suspect a problem with your monitor, see the information supplied with the monitor for adjustment and testing instructions. If you cannot find the problem, check the other listings on monitor problems in this table. If you cannot correct the problem, have the computer serviced. 84 User Guide