After an hour or so we began to smell burning insulation coming from the machine. Two weeks ago, my wife did some processor-heavy graphics stuff and the fan ramped up as usual. Michael Blair writes: I do mainly word processing, but the processor (?) fan of my two-month old 17" iMac G5 would ramp up when I ripped CDs or converted 192 bit MP3s or AIFFs to ACC and MenuMeters indicated heavy processor use. Perhaps the extended Applecare warranty is in my future? By the way, I always use sleep instead of shutting down."Īnother trigger appears to be high processor activity. My iMac was only 92 days old, sure hope this new power supply lasts a little longer. Called Applecare, and they sent me to a local reseller, who actually had a power supply on hand, and got my computer back to me the next day. I took the back off the computer and didn't see any obvious charring, but the burning smell was coming from the power supply. The power light would flash for a second, then nothing. Once I shut down, the iMac wouldn't start up again. I used it for a few minutes, to check the discussion thread again, and get a phone number for Applecare. The computer was still sleeping, and did wake up when prompted. Two days earlier I had read about people having problems with their iMac G5's power supplies burning up so I went straight to the computer first, and it was the source of the smell. I had left the computer sleeping for about 4 hours, and when I came home, there was a burning electrical smell throughout the house. "I too experienced the iMac G5 power supply burning smell. Many users put their iMac G5s to sleep, only to return a few hours later and notice the a burning smell. It got very hot very quickly and appeared to be a potentially dangerous problem."Įxtended Sleep, high processor activity triggers Perhaps the most consistent trigger for this issue is an extended sleep period. We felt very lucky that he was using the computer when it started overheating. We've had it back for a little over two weeks with no further issues so far. They kept it for 10 days and wound up replacing the logic board in addition to the power supply. He took it in the back and looked inside and found that the power supply needed to be replaced. We took it into the Apple store and they ran a number of hardware tests but nothing showed up during the tests. It had stunk up the entire office area he was in. The 17" has had no problems, but after updating the 20" to 10.3.8, I got a call a few hours later from the owner that the 20" started to smell like it was burning and he had to turn it off. "We recently bought two iMac G5s for our company, one 17" combo and one 20" loaded.
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