
If POST completes normally, the BIOS issues one short beep before passing control to the operating system.
Short Beeps | Description |
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1 | Refresh failure |
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2 | Parity cannot be reset |
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3 | First 64 KB memory failure |
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4 | Timer not operational |
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5 | Not used |
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6 | 8042 GateA20 cannot be toggled |
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7 | Exception interrupt error |
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8 | Display memory R/W error |
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9 | Not used |
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10 | CMOS shutdown register test error |
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11 | Invalid BIOS (for example, POST module not found) |
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Beep codes | 95 |