HP dx2290 - Microtower PC Service & Reference Manual page 78

4 short beeps followed by a
three second pause
5 short beeps followed by a
three second pause
70 Appendix C POST Error Messages
Flashing operation has failed (checksum
error, corrupted image, etc.)
BIOS recovery was successful
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.
No action required.