Hi, had my iMac G5 for 3 years and now it's intermittently cutting-out, requiring re-switch-on.

Don't believe it's overheating of fans or problem with power supply / plug / socket. Thought it was hard disk problem but cut-out when using Disk Warrior.

Yet sometimes it works fine with everything loaded i.e itunes, quicktime, word etc. Othertimes doesn't want to know when only Safari open.

Any ideas on what the problem may be as I'm somewhat scatching my head.

Thanks in advance, Steve C.