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"
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.
Memory
| Message | Description |
| Displayed | |
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| |
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| Gate20 Error | The BIOS is unable to properly control the motherboard??s Gate A20 function, which |
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| controls access of memory over 1 MB. This may indicate a problem with the motherboard. |
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| This message will only occur on systems using ECC enabled memory modules. ECC | |
| Error | memory has the ability to correct |
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| modules |
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| A multiple bit corruption of memory has occurred, and the ECC memory algorithm cannot |
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| correct it. This may indicate a defective memory module. |
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| Parity Error | Fatal Memory Parity Error. System halts after displaying this message. |
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| RAM R/W test | This message is displayed by the AMIBIOS8 when the RAM read/write test fails. |
| failed |
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| CMOS | The base memory (memory below 1MB) size that is reported in the CMOS (offset 15h) |
| Memory Size | mismatches with the actual size detected. This condition may occur when the hole is set at |
| Wrong | 512K base memory or when CMOS is corrupted. |
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Boot |
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| Message | Description |
| Displayed | |
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| |
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| Boot Failure | This is a generic message indicating the BIOS could not boot from a particular device. This |
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| message is usually followed by other information concerning the device. |
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| Invalid Boot | A diskette was found in the drive, but it is not configured as a bootable diskette. |
| Diskette |
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| Drive Not | The BIOS was unable to access the drive because it indicated it was not ready for data |
| Ready | transfer. This is often reported by drives when no media is present. |
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| A: Drive Error | The BIOS attempted to configure the A: drive during POST, but was unable to properly |
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| configure the device. This may be due to a bad cable or faulty diskette drive. |
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Chapter 4 | 46 |
