The following beep codes are common to many HP and Compaq desktop computers. Use these codes before referring to the other codes when they occur.
Beeps
Description
1 short beep and 1 long beep
Memory problem
2 short beeps and 1 long beep (repeats 5 times)
Unable to initialize video or video card required but not installed
3 short beeps and 1 long beep
CPU configuration error or CPU type is not compatible
The following beep codes are common to many HP and Compaq desktop computers that can occur
while restoring, flashing or updating the BIOS :
Beeps
Description
1 short beep
Legacy floppy drive or CD/DVD drive not detected
2 short beeps
Floppy diskette or compact disc not detected
3 short beeps
Unable to start flashing (such as when missing a utility or BIOS image)
4 short beeps
Flashing failed (checksum error, corrupted image, etc.)
5 short beeps
BIOS recovery successful
You can refer to the link mentioned below for further troubleshooting:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=bph07107#N589
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