A beep code is an audio signal consisting of a short tone or a series of short tones separated by pauses. For example, beep code 1-2-3 consists of:
Note: | One beep after the POST completes successfully indicates that the system is operating correctly. |
Table 8 lists the beep codes, their meanings, and the possible cause.
Note: | The most likely suspected part is listed first. |
Table 8. Beep codes, meanings, and possible cause.
Beep code | Meaning | Possible cause | ||
1-1-2 | Processor register test failed |
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1-1-3 | CMOS write/read test failed |
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1-1-4 | BIOS ROM checksum failed | System Board | ||
1-2-1 | Programmable Interval Timer failed |
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1-2-2 | DMA initialization failed |
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1-2-3 | DMA page register write/read failed |
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1-2-4 | RAM refresh verification failed |
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1-3-1 | First 64K RAM test failed |
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1-3-2 | First 64K RAM parity test failed |
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2-1-1 | Secondary DMA register failed |
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2-1-2 | Primary DMA register failed |
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2-1-3 | Primary interrupt mask register failed |
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2-1-4 | Secondary interrupt mask register failed |
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2-2-2 | Keyboard controller failed | System Board | ||
2-2-3 | CMOS power failure and checksum checks failed |
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2-2-4 | CMOS configuration into validation failed |
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2-3-1 | Screen initialization failed |
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2-3-2 | Screen memory failed | System Board | ||
2-3-3 | Screen retrace failed | System Board | ||
2-3-4 | Search for video ROM failed | System Board | ||
2-4-1 | Search for video ROM failed | System Board | ||
3-1-1 | Timer tick interrupt failed | System Board | ||
3-1-2 | Interval timer channel 2 failed | System Board | ||
3-1-3 | RAM test failed above address OFFFFH |
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3-1-4 | Time-of-day clock failed. |
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3-2-1 | Serial port failed | System Board | ||
3-2-2 | Parallel port failed | System Board | ||
3-2-4 | Failure comparing CMOS memory size against actual |
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3-3-1 | Memory size mismatch occurred |
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3-3-2 | Critical SMBUS error occurred | Disconnect the appliance cord from the outlet, wait 30 seconds, and
retry. If the symptom persists, suspect the following parts:
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3-3-3 | No operational memory in system |
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Two short beeps | Information only, the configuration has changed |
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Three short beeps |
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One continuous beep |
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Repeating short beeps |
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One long and one short beep |
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One long and two short beeps |
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One long and three short beeps | Monitor not present | None
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Two long and two short beeps |
| Video adapter |