POST Error Messages List
If you cannot run the diagnostics program tests but did receive a POST error message, use “POST Error Messages List” to diagnose system problems. If you did not receive any error message, look for a description of your error symptoms in “Error Symptoms List” on page 120.
NOTE: When you have deemed it necessary to replace an FRU, and have done so, you must run a total system check to ensure that no other activity has been affected by the change. This system check can be done through the diagnostics program.
NOTE: Check all power supply voltages, switch, and jumper settings before you replace the main board. Also check the power supply voltages if you have a “system
If you are unable to correct the problem by using the “BIOS Messages List” table and “Error Symptoms List” table, go to “Undetermined Problems”.
To diagnose a problem, first find the BIOS error messages in the left column. If directed to a check procedure, replace the FRU indicated in the check procedure. If no check procedure is indicated, the first Action/FRU listed in right column is the most likely cause.
| BIOS Messages | Action/FRU |
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| BIOS ROM checksum error - System halted | The checksum of the BIOS code in the BIOS chip is |
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| incorrect, indicating the BIOS code may have become |
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| corrupt. Contact your system dealer to replace the BIOS. |
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| CMOS Battery Failed | The CMOS battery is no longer functional. Contact your |
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| system dealer for a replacement the BIOS. |
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| CMOS Checksum Error- defaults loaded | Checksum of CMOS is incorrect, so the system loads the |
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| default equipment configuration. A checksum error may |
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| indicate that CMOS has become corrupt. A weak battery |
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| may have caused this error. Check the battery and replace |
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| if necessary. |
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| CPU at nnnn | Displays the running speed of CPU. |
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| Display switch is set incorrectly | The display switch on the motherboard can be set to either |
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| monochrome or color. This message indicates the switch is |
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| set to a different setting than indicated in Setup. Determine |
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| which setting is correct, and then either turn off the system |
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| and change the jumper, or enter Setup and change the |
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| Video selection. |
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| Press ESC to skip memory test | The user may press Esc to skip the full memory test. |
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| Floppy disk(s) fail | Cannot find or initialize the floppy drive controller or the |
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| drive. Make sure the controller is installed correctly, if no |
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| floppy drives are installed, be sure the Diskette Drive |
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| selection in Setup is set to NONE or AUTO. |
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| HARD DISK initializing - Please wait a moment | Some hard drives require extra time to initialize. |
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| HARD DISK INSTALL FAILURE | Cannot find or initialize the hard drive controller or the |
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| drive. Make sure the controller is installed correctly. If no |
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| hard drives are installed, be sure the Hard Drive Selection |
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| in Setup is set to NONE. |
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| Hard disk(s) diagnosis fail | The system may run specific disk diagnostic routines. This |
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| message appears if one or more hard disks return an error |
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| when the diagnostics run. |
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| Keyboard Error Or No Keyboard Present | Cannot initialize the keyboard. Make sure the keyboard is |
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| attached correctly and no keys are pressed during POST. |
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| To purposely configure the system without a keyboard, set |
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| the error halt condition in Setup to HALT ON ALL, BUT |
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| KEYBOARD. The BIOS then ignores the missing keyboard |
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| during POST. |
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| Keyboard is locked out - Unlock the key | This message usually indicates that one or more keys have |
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| been pressed during the keyboard tests. Be sure no |
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| objects are resting on the keyboard. |
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97 | Chapter 4 |
