| Sounds | Problem Indicated |
| Repeating short or continuous beeps | Power supply or system board |
| One long and one short beep | System board, display board, or power supply |
| One long and two short beeps | System board or power supply |
| One short beep and blank display | System board or power supply |
| One short beep and prompt for disk | Disk drive, disk controller or cable, system board, or power supply |
| Error Code Number | Problem Indicated |
| 100's | System board |
| 161 | Battery error |
| 162 | Configuration error |
| 163 | Time and date error |
| 165 | System options not set |
| 200's | Memory error |
| 301 | Keyboard |
| 303 | Keyboard |
| 304 | Keyboard |
| 305 | Keyboard fuse |
| 401 | Parallel port |
| 600's except 602 | Floppy drive |
| 602 | Reference disk |
| 701 | Math coprocessor |
| 1100's or 1200's | Serial port |
| 1700's and 10400's | Hard drive |
| 2400's | System board video |
| 8600 | Pointing device |