Need some help with possibly broken PC?

Beeps are your best friend in troubleshooting problematic posts. See this beep guide from computer hope. As already stated, 3 beeps indicates a problem with memory. The prompt sitting there is also common when there is a memory problem.

"Try taking each stick of memory out in turn one by one.

I had this very same problem only last week and it was down to a bad stick of RAM.

Being as though you've already ordered RAM, you might be one step ahead of yourself!"

"A good approach to troubleshooting is to disconnect all but the bare minimum, and see if the computer boots up then. That is, disconnect the hard disks from the motherboard, remove all extension cards (but keep the video card, unless you have an integrated one), remove all but one memory stick, etc.

If it still doesn't boot, if possible test any components that are still removable at another computer to see whether one of them is broken.

In this case: If the three beeps indicate a memory problem but the memory stick seems connected ok, try the memory in another computer, or try booting your computer with a new (inexpensive) memory stick to determine whether the problem is with the motherboard, or the memory stick itself."