IBM 6643 User Manual page 70

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 67 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
Audio problems
CD-ROM or DVD-ROM
drive
Diskette drive
Display/monitor
DVD disc
General
Intermittent
Keyboard, mouse, or
pointing device
Memory
Modem
Optional device
Software
Universal Serial Bus (USB)
device
54
User Guide
Go to
"Audio problems" on page 55
"CD-ROM or DVD-ROM drive problems" on page 56
"Diskette drive problems" on page 58
"Display/monitor problems" on page 58
"DVD disc problems" on page 57
"General problems" on page 59
"Intermittent problems" on page 59
"Keyboard, mouse, or pointing device problems" on
page 60
"Memory problems" on page 61
"Modem problems" on page 62
"Optional-device problems" on page 65
"Software problems" on page 66
"Universal Serial Bus (USB) problems" on page 66