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Decoding POST Messages

After the POST and boot sequence have advanced to the point at which they have use of the video to display messages, they can display a numerical error message to indicate a failure that occurred during the POST or boot sequence.

Code Description
1xx Motherboard errors
2xx Main memory errors
3xx Keyboard errors
5xx Colour graphics adapter errors
6xx Floppy disk controller errors
14xx Printer errors
17xx Hard drive controller errors
86xx Mouse error


Installing new hardware, especially hard drives, can result in error messages like 'no boot disk'. This will have happened when you switch on the computer that you have just built.

Next: Decoding the Beeps