I've just put together a new PC for a friend and I'm having problems with it booting.
When I switch it on the system beeps continuously for a few seconds then restarts and does the same over and over until I switch it off at the supply. I've build loads of PC's before but this is the first time I've come across this - the code isn't covered in the list of post codes for an Award BIOS.
All of the fans come on but the monitor doesn't seem to get a signal - I suspect this is because the system is rebooting before it's activated by the graphics card. When I unplug the 12v ATX connector and start the system there is no beep and all of the fans come on but again, the monitor doesn't get a signal from the graphics card.
Try removing everything which is non essential. It may be a hardware incompatibility.
Try reseating the video card. I get those beeps when the video card is not properly seated.
Try reseating the memory also.