Beeps Diagnosis Recommended action
4 short beeps, 3
second pause
Flashing operation has failed
(checksum error, corrupted image,
etc.)
1. Verify the correct ROM.
2. Flash the ROM if needed.
3. If an expansion board was recently added, remove it to see if
the problem remains.
4. Clear CMOS.
5. If the message disappears, there may be a problem with the
expansion card.
6. Replace the system board.
5 short beeps, 3
second pause
BIOS recovery was successful No action required.
LED Codes
The following table describes the LED states for the Compaq 500B and 505B MT Desktop PCs.
LED State LED Status
Power LED Indicator System on (normal operation) Steady green
Suspend to RAM Blinks green every 2 seconds
Computer off LED not on
Drive LED Indicator Normal hard drive activity Green drive LED is flashing
Table B-1 Diagnostic Beep Codes (continued)
62 Appendix B Diagnostics
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