IBM 6644 - Manual (Page 60)

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Device troubleshooting charts
You can use the troubleshooting charts in this section to find solutions to
problems that have definite symptoms.
If you have just added new software or a new computer option and your
computer is not working, do the following before using the troubleshooting
charts:
1. Remove the software or device you just added.
2. Run the diagnostic programs to determine if your computer is running
properly. (See “Running the IBM Enhanced Diagnostics program” on page 57
for information about diagnostic programs provided with your computer.)
3. Reinstall the new software or new device.
Use the following directory to quickly locate problem categories in the
troubleshooting charts.
Problem type Go to
Audio problems “Audio problems” on page 48
CD-ROM drive “CD-ROM drive problems” on page 49
Display/monitor “Display/monitor problems” on page 50
General “General problems” on page 50
Intermittent “Intermittent problems” on page 51
Keyboard, mouse, or pointing
device “Keyboard, mouse, or pointing device problems” on
page 51
Memory “Memory problems” on page 52
Modem “Modem problems” on page 52
Optional device “Optional-device problems” on page 55
Software “Software problems” on page 56
Universal Serial Bus (USB) device “Universal Serial Bus (USB) problems” on page 56
If you find it necessary to remove the computer cover, first read “Safety
information” on page vii.
Important