Howdy,
can you go to place you bought it and show them. or ask for used video card to try.
one beep is good. one long distress beep might mean, 'got no video, can't show you what is wrong' depending on your BIOS version. might mean something else. like no brains (processor or cmos went bad or got too hot due to fan quit or came unseated after travels, same idea with ram and other cards in pc). put finger in box, wiggle stuff. feel for heat. smell for burned. find all the fans? all spinning? if one card wiggles (remember to check ram) reseat that one (with power off and static care taken) or move to another slot (except don't move ram into another slot all ram doesnt work in all slots). if no wiggly ones, reseat *all* the cards, especially the video and the ram. follow the monitor cable back to the computer. that is your video card.
google 'ami beep code' to see what beep codes mean. since you can't get far enuf yet into the boot to see your bios, just try the stuff suggested by your beep