2114 Views 1 Reply Latest reply: Sep 25, 2006 10:49 AM by Kenichi Watanabe
(1) The first thing that often fails is the analog video board. This is the part that feeds the CRT display. I think heat contributes to failure, so keeping the vents clear of obstruction may help.
(2) These are the key new features of 10.4, according to Apple
Of these, iChat AV will be of limited use (the "AV" part). QuickTime 7 can be installed in 10.3 for free. Safari RSS and Mail are new versions not available to 10.3 users, but great alternatives exist for web browser and email. The other features may or may not be of value to you. If you think they are worth the upgrade cost, you should get 10.4. If not, don't upgrade for the sake of upgrading, because 10.3.9 is a solid release. With 1GB of RAM, you should be able to use either one without performance issues.
(3) I don't think the processor upgrade would change the iMac's lifespan. The recent G4's probably put out about the same heat as the old G3's. You wouldn't get too much more clock speed, so it would mostly help performance if you deal with graghics, audio, or video content. I think you have to send in the motherboard, or the whole iMac, so if everything is working great, you may not want to risk damage from shipping, plus you won't be able to "put the G3 back" if you have problems with the upgrade.