Compaq Deskpro AP240, Reference Manual, Page: 197 / 216

Reference Guide E-11
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Power-On Self-Test Messages
Continued
Message Beeps* Probable Cause Recommended Action
1800-Temperature
Alert None Internal temperature exceeds
specification. 1. Check that workstation air vents
are not blocked and cooling fan is
running.
2. Verify processor speed selection.
3. Replace the processor.
4. Replace the system board.
1801 None Processor not supported by
ROM Bios. Upgrade BIOS to proper version.
Audible 1L, 3S System ROM is bad; system
is running in Failsafe Boot
Block mode. Reflash the ROM using a ROMPaq
diskette. Refer to the “Failsafe Boot
Block ROM” section of Chapter 3,
“Desktop Management.”
Audible 2S Power-on successful. None.
Flashing Caps Lock
LED on Keyboard 1L, 2S Graphics controller not
present or incorrectly
initialized. 1. Following directions in Appendix G
to clear CMOS.
2. If graphics card has been added,
remove and reseat.
Flashing Num Lock
LED on Keyboard 1S, 2L System memory not present. 1. Check memory module (refer to
Chapter 5, “Upgrading the
Desktop Workstation,” or Chapter
6, “Upgrading the Minitower
Workstation”).
2. Remove and reseat memory
module.
3. See the “Solving Memory
Problems” section of Chapter 8,
“Troubleshooting.”.
Num Lock LED ON
(keyboard) None Failed Boot Block. Reflash the ROM using a ROMPaq
diskette. Refer to the “Failsafe Boot
Block ROM” section of Chapter 3,
“Desktop Management.”
Flashing Scroll Lock
LED on keyboard 2L, 1S System board hardware
failure (prior to graphics). Replace system board.
* L = Long, S = Short
Continued