
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 
POST Messages
| Message | Beeps* | Probable Cause | Recommended Action | ||||
| 
 | 
 | 
 | 
 | 
 | 
 | 
 | |
| 1L, 1S | System ROM checksum | Replace the system board. | |||||
| 
 | 
 | 
 | 
 | 
 | |||
| 1L, 1S | Option ROM checksum | 1. | Verify the correct system ROM. | ||||
| Error | 
 | 
 | 
 | 
 | 2. | Flash the system ROM to the latest | |
| 
 | 
 | 
 | 
 | 
 | |||
| 
 | 
 | 
 | 
 | 
 | 
 | 
 | revision, if required. | 
| 
 | 
 | 
 | 
 | 
 | 3. | Contact Compaq technical support. | |
| 
 | 
 | 
 | 
 | ||||
| None | DMA, timers, and so on. | Replace the Expansion Cage System | |||||
| 
 | 
 | 
 | 
 | 
 | Board. Run the Computer Setup utility. | ||
| 
 | 
 | 
 | 
 | ||||
| 2S | No diskette drive or mismatch in | Run Computer Setup or Windows NT | |||||
| 
 | 
 | 
 | drive type | utilities. | |||
| 
 | 
 | 
 | 
 | ||||
| 2S | Configuration incorrect | Run Computer Setup or Windows NT | |||||
| 
 | 
 | 
 | 
 | 
 | utilities. | ||
| 
 | 
 | 
 | 
 | ||||
| 2S | Invalid time or date in | Run Computer Setup or Windows NT | |||||
| 
 | 
 | 
 | configuration memory | utilities. | |||
| 
 | 
 | 
 | 
 | ||||
| 2S | Memory configuration incorrect | Run Computer Setup or Windows NT | |||||
| 
 | 
 | 
 | 
 | 
 | utilities. | ||
| 
 | 
 | 
 | 
 | ||||
| None | NVRAM configuration error | Allow system to completely boot. | |||||
| Nonvolatile Memory Invalid | 
 | 
 | 
 | 
 | Reboot. | ||
| 
 | 
 | 
 | 
 | 
 | |||
| None | RAM failure | 1. | Run Computer Setup or Windows NT | ||||
| 
 | 
 | 
 | 
 | 
 | 
 | 
 | utilities. | 
| 
 | 
 | 
 | 
 | 
 | 2. | Replace the DIMMs. | |
| 
 | 
 | 
 | 
 | ||||
| None | Invalid memory configuration | 1. Run Computer Setup or Windows NT | |||||
| Mismatch | 
 | 
 | 
 | 
 | 
 | 
 | utilities. | 
| 
 | 
 | 
 | 
 | 
 | 2. | Replace the DIMMs. | |
| 
 | 
 | 
 | 
 | 
 | |||
| None | RAM failure | 1. | Run Computer Setup or Windows NT | ||||
| 
 | 
 | 
 | 
 | 
 | 
 | 
 | utilities. | 
| 
 | 
 | 
 | 
 | 
 | 2. | Replace the DIMMS. | |
| 
 | 
 | 
 | 
 | 
 | 3. | Replace the system board. | |
| 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
| None | Cache memory error | Run the Computer Checkup or | |
| 
 | 
 | 
 | Diagnostics utilities. | 
| 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | Continued | 
Compaq Professional Workstation AP500 Maintenance and Service Guide
