|The beeps are generated by the BIOS, in this case telling you that there's a hardware problem. The meaning of the actual beep code varies according to the BIOS manufacturer or the PC manufacturer, neither of which you've included.|
Generally speaking, and certainly on HP & Compaq computers, one short and one long beep means there's a problem with one or more of the RAM modules. Sometimes the modules just need taking out and putting back to clean the slots. If that makes no difference, new RAM modules will be required.
You can test the existing RAM modules with Memtest86: http://www.memtest86.com/
Reseat the modules before testing them, just to rule out bad connections between the module and the slot.
Discharge static from your body before touching RAM modules or you'll definitely have to buy new ones!
message edited by phil22