I have another computer problem. Remember, I don't know all the jargon and I don't know what goes on inside the mah-cheen either so words of one syllable would be helpful!

When I press the button on the computer tower to start it up, the button flashes on and off and the computer won't come on. At this stage I can only switch it off by holding the button in for about 4 seconds. It takes several tries to get the computer started. When it is on, it sounds like a Massey Ferguson starting up. The computer is in a spare bedroom. We can hear it's 'engine' when we are downstairs in the living room. Is it about to die on me?