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4-3
Compaq Professional Workstation AP500 Maintenance and Service Guide
POST Messages
An error message results if POST encounters a problem. This test runs when the system is turned
on, checking assemblies within the workstation and reporting any errors detected.
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended Action
101-ROM Error 1L, 1S System ROM checksum Replace the system board.
101-Option ROM Checksum
Error
1L, 1S Option ROM checksum 1. Verify the correct system ROM.
2. Flash the system ROM to the latest
revision, if required.
3. Contact Compaq technical support.
102-System Board Failure None DMA, timers, and so on. Replace the Expansion Cage System
Board. Run the Computer Setup utility.
162-System Options Error 2S No diskette drive or mismatch in
drive type
Run Computer Setup or Windows NT
utilities.
162-System Options Not Set 2S Configuration incorrect Run Computer Setup or Windows NT
utilities.
163-Time & Date Not Set 2S Invalid time or date in
configuration memory
Run Computer Setup or Windows NT
utilities.
164-Memory Size Error 2S Memory configuration incorrect Run Computer Setup or Windows NT
utilities.
172-1 Configuration
Nonvolatile Memory Invalid
None NVRAM configuration error Allow system to completely boot.
Reboot.
201-Memory Error None RAM failure 1. Run Computer Setup or Windows NT
utilities.
2. Replace the DIMMs.
202-Memory Type
Mismatch
None Invalid memory configuration 1. Run Computer Setup or Windows NT
utilities.
2. Replace the DIMMs.
203-Memory Address Error None RAM failure 1. Run Computer Setup or Windows NT
utilities.
2. Replace the DIMMS.
3. Replace the system board.
205-Memory Error None Cache memory error Run the Computer Checkup or
Diagnostics utilities.
Continued