4 BIOS overview
beep codes and error messages
beep codes and error messages
If a terminal error occurs during POST, the system issues a beep code before attempting to display the error in the upper left corner of the screen. Beep codes are useful for identifying the error when the system is unable to display the error message.
Number of | Error Message | Description | |
Beeps | |||
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1 | Refresh Failure | The memory refresh circuitry on the motherboard is faulty. | |
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2 | Parity Error | Parity error in the first 64 KB of memory. | |
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3 | Base 64KB Memory Failure | Memory failure in first 64 KB. | |
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4 | Timer Not Operational | Memory failure in the first 64 KB of memory, or Timer 1 on | |
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| the M/B is not functioning. | |
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5 | Processor error | The CPU(Central Processing unit) on the M/B generated an | |
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| error. | |
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6 | Processor Exception | The CPU generated an exception interrupt. | |
| Interrupt Error |
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7 | Processor Exception | The CPU generated an exception interrupt. | |
| Interrupt Error |
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8 | Display Memory Read/ Write | The system video adapter is either missing or its memory is | |
| Error | faulty. This is not a fatal error. | |
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9 | ROM Checksum Error | The ROM checksum value does not match the value | |
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| encoded in the BIOS. | |
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10 | CMOS Shutdown Register | The shutdown register for CMOS RAM failed | |
| Read/ Write Error |
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11 | Cache Error/ External Cache | The external cache is faulty | |
| Bad |
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