Answer
This question was answered on June 16, 1999.
Much of the information contained herein may have changed since posting.
The IBM Aptiva systems use sequences of beeps at startup to signal system errors. After checking the IBM website, the error of a continuous beep indicates a system board error. Is your system new enough to still be under warranty, if it is this would be the first way to start.
continuous beep, but different sequences of beeps this would indicate other possible problems and
If the beep at startup is not actually a long would help diagnose the situation.