hey, first check ur monitor cable, make sure u have attached it firmly to its socket.
then, try removing & reseating ur RAM
do u use a agp card or onboard video.........??
AWARD BIOS BEEP CODES
1 long, 2 short - Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information
Any other beep(s) RAM problem.
Alternating high & low (tones) beeps - CPU problem ........try removing & reseating ur processor