IBM 6862 - PC 300 PL, User Manual

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Beep Code Probable Cause
2–3–3 Screen retrace tests in progress or failure
3–1–1 Timer tick interrupt test failure
3–1–2 Interval timer channel 2 test failure
3–1–4 Time-of-day clock test failure
3–2–4 Comparing CMOS memory size against actual
3–3–1 Memory size mismatch occurred
Chapter 7. Solving problems
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