Well, hopefully it is only a heart attack. It was fine yesterday, went to turn it on this morning. Nothing. I read these pages at Apple.com:
- iMac G5: Troubleshooting when your computer won’t turn on
- iMac G5: Loose power cord could cause power loss
- iMac G5 Repair Extension Program for Video and Power Issues
And hooray (hooray ?!) my serial number is in the range probably covered by the extended repair program. I have an appointment on Monday morning at the local Apple Genius bar. I did call Apple tech support, and got someone on the line. He was as helpful as he could be, he walked me through a couple steps and acknowledged it probably is a hardware problem.
I should have gotten the extended warranty (Applecare) plan, but I forgot about it until after the year had passed after getting the iMac in December 2004. Hopefully, the machine will be able to be repaired for free.