| 501 | COLOR ADAPTER Color memory test failed, horizontal sync frequency test, or video test failed. |
| 503 | CGA adapter controller failed |
| 508 | COLOR ADAPTER User indicated display attribute failure. |
| 516 | COLOR ADAPTER User indicated character set failure. |
| 524 | COLOR ADAPTER User indicated 80X25 mode failure. |
| 532 | COLOR ADAPTER User indicated 40X25 mode failure. |
| 540 | COLOR ADAPTER User indicated 320X200 graphics mode failure. |
| 548 | COLOR ADAPTER User indicated 640X200 graphics mode failure. |
| 556 | COLOR ADAPTER Light pen test failed. |
| 564 | COLOR ADAPTER User indicated screen paging test failure. |