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iMac randomly suts down...
- Thread starter imacintel
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What stuff were you doing? What's plugged in to the iMac? Could the power cable have accidentally been kicked out of the power socket? 
I'm guessing it's an Intel iMac.
As for the heat thing, that's a good point. However, if that's the case, it would have been sleeping and not shut down. Was there a pulse light?
As for the heat thing, that's a good point. However, if that's the case, it would have been sleeping and not shut down. Was there a pulse light?
mad jew said:I'm guessing it's an Intel iMac.
As for the heat thing, that's a good point. However, if that's the case, it would have been sleeping and not shut down. Was there a pulse light?
I've known computers to shut down when overheating.
It could have been anything. See if it happens again.
benthewraith said:I've known computers to shut down when overheating.
Macs will almost always fall asleep before they crash from overheating.
mad jew said:Macs will almost always fall asleep before they crash from overheating.
That's good.
Answer:ALL
Ok.
I was only doing light surfing in Safari. CoreDuoTemp and Temperature Monitor both report about 38C(hard drive, CPU). My power cord was as tight as possible. Both ends. Any ideas? Could it be an earlier problem I had with the Power Management/SMC chip?
Ok.
I was only doing light surfing in Safari. CoreDuoTemp and Temperature Monitor both report about 38C(hard drive, CPU). My power cord was as tight as possible. Both ends. Any ideas? Could it be an earlier problem I had with the Power Management/SMC chip?
Well it's very likely it's an SMU issue. What were your earlier problems? Was the power supply replaced?
This sounds like what's happening to my iMac G5. I had the PSU replaced, I had the logicboard replaced, but it's still shutting down. I talked to one of Apple's technicians today and he told me they had recieved a bad batch of PSU's, and that might be the problem. I'll probably know more in a few days when I get a visit from Apple - to, once again, replace the PSU.
Lazze
Lazze
mad jew said:Macs will almost always fall asleep before they crash from overheating.
I have to call B.S. on this one.
imacintel said:
How did it get fixed? If you're continually having issues that could be based around the power supply, then I'd take it in to Apple and ask for a replacement. A bad power supply can potentially (although not usually) wreck a lot of other components on your machine so it's something that should probably be sorted out. If it's fine at the moment, then let it be, but if it plays up again I'd take it straight back to Apple.
kevin.rivers said:
When a Mac reaches a certain temperature (obviously different for each line) in a certain component it falls asleep. In most cases this means the heat source is switched off such that the Mac stops getting hotter, eventually cooling down. The PMU or SMU (depending on your Mac) will not let you wake the machine again until it has fallen below a certain temperature threshold again. Therefore, unless you're in the very rare circumstance of having a Mac that continues to heat up through the sleep process (weird because only the RAM and parts of the logic board are powered), it won't shut down.
mad jew said:How did it get fixed? If you're continually having issues that could be based around the power supply, then I'd take it in to Apple and ask for a replacement. A bad power supply can potentially (although not usually) wreck a lot of other components on your machine so it's something that should probably be sorted out. If it's fine at the moment, then let it be, but if it plays up again I'd take it straight back to Apple.
When a Mac reaches a certain temperature (obviously different for each line) in a certain component it falls asleep. In most cases this means the heat source is switched off such that the Mac stops getting hotter, eventually cooling down. The PMU or SMU (depending on your Mac) will not let you wake the machine again until it has fallen below a certain temperature threshold again. Therefore, unless you're in the very rare circumstance of having a Mac that continues to heat up through the sleep process (weird because only the RAM and parts of the logic board are powered), it won't shut down.
Ok. Thanks. I will look in to taking it into my mac store. when will apple expand their stores in to can?