Packard Bell (iMedia) desktop wont turn on

The computer was not in use for several months. When pressing the power button it, the button lights up blue and the icon above flashes up making beeping noises, but the computer won't turn on, only making noise. I tried to disconect and connect the power cable again, but to no avail.

how many beeps?
and are they long or short

The beeps are continuous, not very loud though,every second

The beeps have a meaning, but we need to know exactly what they are. There will be a pattern, e.g. 3 beeps, pause, one beep, longer pause, and then repeated again. The number and pattern indicates what has failed.

When you say continuous every second, do you mean a single beep, pause, then the same repeated?