Geo, since I am not sure what BIOS you have, I am going out on a limb here and assuming that you have an AMI BIOS—since all you get are 4 beeps and no other error (Beep) codes. A series of four short beeps indicates memory failure in the first 64 KB of operational memory or that Timer 1 on the motherboard is not functioning. One long beep followed by three short beeps indicates memory problems.

So right now, I would start there. Take out the RAM , then insert it again. If still has the beep error, change the RAM or pull one memory stick and then start up. Then install the memory stick and pull the other one. This should reset your memory and it should (could) work. Also remember that the DV series has some serious overheating issues. I am not sure if this is part of what is going on with yours. Just keep it in mind. This link explains it a bit and can help you out if it is an overheating issue. Let us know what works so we can continue to help you out. Good Luck.