I bought my iMac G5, a 20-inch iSight, 2.1 GHz model (MA064LL/A), at
the end of January 2006 after the first Intel iMac was revealed and
the price of the iMac G5 began to drop. I really like it and hope it
lasts forever!
According to MacTracker, the iMac G5 was brought out in three major
revisions from August 2004 through October 2005, and was finally
discontinued in March 2006. The first version of the iMac G5 (1.8
GHz), and probably also the second revision (2.0 Ghz), was made with
defective electrolytic capacitors that caused logic-board failures
within a year or two. I was under the impression that the third
revision (2.1 GHz iSight) was not built with these capacitors. My
computer has shown no external evidence of logic-board problems.
Until recently I thought all of the third revision were free of the
capacitor problem. However, the message by John Hobbs included in
<http://groups.google.com/group/imaclist/browse_thread/thread/ffdfb88089231079%3EiMac%20G5%20Problems>
points out that even these 2.1 GHz iSight models could show failures
due to faulty capacitors. In Mr. Hobbs' case, the problem appears to
have been due to a sloppy job of manual replacement of capacitors at
Apple's factory before it was shipped out. So far I have had no
reason to open my computer to look for bulging or popped capacitors;
I hope I have better luck than Mr. Hobbs.
I should add that each of the three major revisions seems to have
some minor versions. For example, the iLife package bundled with my
machine was iLife '05, whereas some people who bought nominally the
same model of iMac G5 received iLife '06 with their computers,
clearly a later version. But I don't know if my hardware is any
different in the machines that came with iLife '06.
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