We've 3 Macs under power. When not running, they sleep. For years now. So far so good. Paul Moortgat On 10 Jan 2008, at 05:21, nagable at comcast.net wrote: > To put a fly in your ointment: > > I used a Power Mac 5500 as a server from 1997 to 2005, and 3 G4s > from 2000 to 2005. Never shut them down. They were still going > when they were replaced by Dell servers. I repaired Macs for a > school district and rarely had a power supply problem. They were > usually left running in the computer labs. > > For what it's worth. > > Nate > -------------- Original message ---------------------- > From: jonny <g4 at salemoregon.com> >>> I've spent 29 years in the semiconductor industry and >>> have qualified many product after various "stress" >>> tests. >>> >>> No-one has ever suggested a "turn-on, turn-off" test >>> :-) >>> >>> We do however perform accelerated life tests at above >>> normal Voltages and temperatures. I have to tell you >>> that semiconductors DO wear out with continuous usage. >>> >> >> <snip> >> >> Thank you, John <all>...for an interesting & informative thread. >> >> I'm going to begin shutting down when I'm through for the day, and >> sleeping when I'm inactive. I used to do this ALL the time, then for >> whatever reason, I stopped doing it about a year ago. >> >> Thanks for the reminder to protect my mac AND conserve energy. >> >> jonny >