
CHAPTER 6: Troubleshooting
Beep codes
Whenever a recoverable error occurs during the
A PCI expansion card (for example, a RAID controller) can also issue audible errors by itself, usually consisting of one long tone followed by a series of short tones. For more information on the beep codes issued, check the documentation for that device.
The following table shows POST error beep codes. Prior to system video initialization, BIOS uses these codes to inform you of error conditions.
Beeps | Description | Troubleshooting steps |
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1 | Memory refresh timer error | Reseat the memory modules or replace with |
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| modules you know are good. |
2 | Parity error in the first 64 KB of memory. | Same as for 1 beep. |
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3 | Base memory read/write test error | Same as for 1 beep. |
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Possiblesystem board malfunction. To eliminate the possibility of an add
If the beep codeoccurs even when all expansion cards have been removed, the system board is at fault.
If the beep code does not occur when the expansion cards have been removed, one of the cards is causing the problem. Install the cards one at a time until the problem happens again. When the beep code returns, the most recent card you installed is at fault.
Remove one of the processors if two are installed, then try a known good processor in the first socket.
Same as for 4 beeps.6 | The keyboard controller (8042) may be | Remove the keyboard to see if the error goes |
| defective. The BIOS cannot switch to Protected | away. If it does, try a known good keyboard. |
| mode. | Same as for 4 beeps. |
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7 | General exception error (processor exception | Same as for 5 beeps |
| error). |
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8 | Display memory error (system video adapter). | If the system video adapter is an |
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| replace or reseat the video adapter. If the video |
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| adapter is integrated into the system board, the |
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| board may be faulty. Try using an |
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9 | The ROM checksum value does not match the | Same as for 4 beeps. |
| value encoded in the BIOS. |
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10 | The shutdown register for CMOS RAM failed. | Same as for 4 beeps. |
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11 | The cache memory test failed. | Same as for 4 beeps. |
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