POST error codes
Each time you
vChecks some basic
vChecks the memory operation
vStarts the video operation
vVerifies that the boot drive is working
If the POST detects a problem, an error message appears on the screen. A single problem can cause several error messages to appear. When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time you turn on the system.
POST Error Message | Description/Action |
|
|
CMOS battery failed | The CMOS battery is no longer functional. |
| Replace the battery. |
|
|
CMOS checksum error - defaults loaded | Checksum of CMOS is incorrect. |
| The computer loads the default |
| configuration settings. This error might |
| indicate that CMOS has become corrupt due |
| to a weak CMOS battery. |
|
|
CPU at nnnn | nnnn is the running speed of the |
| microprocessor. |
|
|
Press Esc to skip memory test | Pressing Esc skips the full memory test |
|
|
HARD DISK INSTALL FAILURE | Cannot find or initialize the hard disk drive |
| controller or the drive. |
| Make sure the hard disk drive is correctly |
| installed. |
| If no hard disk drives are installed, make |
| sure the hard disk drive selection in Setup is |
| set to NONE. |
|
|
Keyboard error or no keyboard present | Cannot initialize the keyboard. |
| Make sure the keyboard is properly |
| connected to the computer and that no keys |
| are held pressed during POST. |
| To purposely configure the computer |
| without a keyboard, set the error halt |
| condition in Setup to HALT ON ALL, BUT |
| KEYBOARD. The BIOS then ignores the |
| missing keyboard during POST. |
|
|
Memory Test: | This message displays during a full memory |
| test, counting down the memory areas being |
| tested. |
|
|
Memory test fail | If POST detects an error during memory |
| testing, additional information appears. This |
| information gives specifics about the type |
| and location of the memory error. |
|
|
