| 301 | POST Error - Keyboard error |
| 301 | DIAGS Error - Replace keyboard |
| 302 | DIAGS Error - User indicated error |
| 303 | POST Error - Keyboard or System Board error |
| 303 | DIAGS Error - System Board failure |
| 304 | POST Error - System Board error |
| 305 | POST Error - PS2 keyboard fuse (located on system board);Keyboard +5v error |