IBM Aptiva 2198, Reference Manual

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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.
Important
If you find it necessary to remove the computer cover, first read “Safety
information” on page vii and “Removing the cover” on page 59 for
important safety information and instructions.
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
correctly. (See “IBM Diagnostic Programs” on page 123 for information
about diagnostic programs provided with your computer.)
3. Reinstall the new software or new device.
Beep code Probable cause
1–1–4 BIOS ROM checksum failure
1–2–1 Programmable interval timer test failure
1–2–2 DMA initialization failure
1–2–3 DMA page register write/read test failure
1–2–4 RAM refresh verification failure
1–3–1 First 64 K RAM test failure
1–3–2 First 64 K RAM parity test failure
1–4–3 Fail-safe timer test in progress
1–4–4 Software NMI port test in progress
2–1–1 Secondary DMA register test in progress or failure
2–1–2 Primary DMA register test in progress or failure
2–1–3 Primary interrupt mask register test failure
2–1–4 Secondary interrupt mask register test failure
2–2–2 Keyboard controller test failure
2–3–2 Screen memory test in progress or failure
2–3–3 Screen retrace tests in progress or failure
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Aptiva Reference Guide