Appendix A: Post Messages
A POST Messages
The following table lists the Power On Self Test (POST) messages, possible causes and solutions.
| Message | Possible Cause | Solution |
|
|
|
|
|
|
| DISKETTE DRIVE A | Drive A failed or is | Check Setup and cable |
|
| FAILURE |
| ||
| missing. | connections. |
| |
|
|
| ||
|
|
|
|
|
| DISKETTE DRIVE B | Drive B failed or is | Check Setup and cable |
|
| FAILURE |
| ||
| missing. | connections. |
| |
|
|
| ||
|
|
|
|
|
| EXTENDED RAM | Extended memory not | Replace defective |
|
| FAILED AT |
| ||
| working or configured | memory. |
| |
| OFFSET: nnnn |
| ||
| properly. |
|
| |
|
|
|
| |
|
|
|
|
|
| FAILING BITS: nnnn | Memory failure in | Replace defective |
|
|
|
| ||
|
| System, Extended, or | memory. |
|
|
| Shadow memory. |
|
|
|
|
|
|
|
| FIXED DISK X | The hard disk is not | Rerun SETUP and check |
|
| FAILURE (where X | configured or working | connections, or replace |
|
| =0 or 1) | properly. | hard disk. |
|
|
|
|
|
|
| FIXED DISK | The controller card has | Check configuration and |
|
| CONTROLLER | failed. | connections, or replace |
|
| FAILURE |
| controller card. |
|
|
|
|
|
|
| INCORRECT DRIVE | Floppy drive A: not set | Run Setup. |
|
| A TYPE |
| ||
| correctly in Setup. |
|
| |
|
|
|
| |
|
|
|
|
|
| INCORRECT DRIVE | Floppy drive A: not set | Run Setup. |
|
| B TYPE |
| ||
| correctly in Setup. |
|
| |
|
|
|
| |
|
|
|
|
|
| INVALID NVRAM | NVRAM chip is bad. | Requires repair of system |
|
| MEDIA TYPE |
| ||
|
| board. |
| |
|
|
|
| |
|
|
|
|
|
| KEYBOARD | The keyboard or | Check connections. You |
|
| ERROR, or |
| ||
| keyboard controller | may have to replace the |
| |
| KEYBOARD |
| ||
| failed. | keyboard or controller. |
| |
| CONTROLLER |
| ||
|
|
|
| |
| ERROR |
|
|
|
| KEYBOARD | A key is jammed or was | Make sure the keys are |
|
| ERROR nn | held down during boot. | not jammed or dirty. |
|
|
|
|
|
|
| KEYBOARD | Keyswitch on the front of | Unlock the keyswitch. |
|
| LOCKED | the case is locked. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M54E2 System Board Manual |