|This is the foxconn beep code faq:|
Your 1 short and 1 long would seem to fall under the 'all other beeps' as a memory related error.
It might be the ram sticks or the slots. Blow all the dust out with some compressed air, hitting the ram slots really good. Make sure slot and stick contacts aren't tarnished. Sometimes taking a pencil eraser to the the stick contacts will help.