flash, your computer is POSTing - just not successfully. Silence would indicate that the POST did not run.
Manual for my Gigabyte mb says that 1 long, 2 short beeps in rapid sequence indicates a problem video card or monitor. "Rapid sequence" means that the interval between each beep is about the same length of time as one short beep.
You said "it beeps once then about 5 seconds later it beeps twice fast".
My manual says that two short beeps (by themselves) means "CMOS setting error".
You might try resetting the CMOS. Your manual will tell you how.