Hi, First post so please bare with me. Whilst Tech able I'm not really good on the jargon as self taught! I have a problem with my iMac G4. I'm running the latest version of 10.3 and from memory it is 1GHZ 17" monitor. My mac has stopped booting up. I get the initial ping, the light on the infra red mouse lights up, the fan starts and I can hear other noises from within but nothing happens. The screen remains black and there is no response to button tapping after a prolonged wait. Shuts off by pushing power button fine! I've had it for about 4 years, I think, you know how time flys. Any thoughts!