Hi Tenapence,
The beep code indicates a video error. Refer below:
http://www.qpci.com/beepcodes/compaqbeep.htm
As stated on the site you may need to check the internal connections in your PC.
Preferably remove the Video card (if it is not onboard) and reseat it. Check other connections while you are in there. RAM cables etc.
If it is onboard (video runs directly from motherboard, no card), it might pay to consider obtaining a compatible video card to workaround the problem if nothing else works.