Re2: [X4U] Leaving an iMac running 24/7

[Randy B.Singer]

Lars Bertelsen said:

>Oh, and I just couldn't let this slide! ;-)
>The Mac Plus flyback failures weren't caused by 
>heat so much as by the high frequency vibrations 
>of the transformer... We used to glue them in 
>place after repairing the joints, and they almost 
>never failed again!


The Pluses that I installed a fan in never failed.  Which is what I used 
to routinely do for clients.  That's why I concluded that it was a heat 
cycling problem.  (And Mac Pluses got really hot...)

Not that it makes a difference now.  However, some of the original iMacs 
had similar heat cycling problems.





Randy B. Singer
Co-Author of: The Macintosh Bible (4th, 5th and 6th editions)

Routine OS X Maintenance and Generic Troubleshooting
http://www.macattorney.com/ts.html