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Power-On Self-Test (POST)
POST is a series of diagnostic tests that run automatically on Compaq computers when the system is turned on. POST checks the following assemblies to ensure that the computer system is functioning properly:
■Processors
■Keyboard
■Power supply
■System board
■Memory
■Memory expansion boards
■Controllers
■Diskette drives
■Hard drives
POST Error Messages
If POST finds an error in the system, an error condition is indicated by an audible and/or visual message. If an error code displays on the screen during POST or after resetting the system, follow the instructions in Table
In each case, the Recommended Action column lists the steps necessary to correct the problem. After completing each step, run the Diagnostics program to verify whether the error condition has been corrected. If the error code reappears, perform the next step, then run the Diagnostics program again. Follow this procedure until Diagnostics no longer detects an error condition.
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| Table |
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| POST Error Messages |
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| Audible Beeps |
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Error Code |
| L=Long S=Short |
| Probable Source of Problem |
A Critical Error |
| None |
| A catastrophic system error, |
occurred prior to |
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| which caused the server to |
this |
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| crash, has been logged. |
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| 1L,1S |
| System ROM checksum. | |
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| None |
| Options ROM checksum. | |
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| None |
| DMA, timers, and so on. | |
Failure |
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| None |
| System board failure. | |
Failure |
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Recommended Action
Run Diagnostics. Replace failed assembly as indicated.
Run Diagnostics. Replace failed assembly as indicated.
Run Diagnostics. Replace failed assembly as indicated.
Replace the system board. Run the Compaq System Configuration Utility.
Run Diagnostics. Replace failed assembly as indicated.
Continued