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Mac Forum / Country Specific / Australian Mac Group / January 2008MacMini startup and shutdown problem
I have a MacMini (OSX.4.11) that has decided it won't turn itself off fully without my pressing the button at the back after it has shut itself down (i.e., the light on the front has gone off). Additionally, I have it set to turn itself on at 8:00 am on weekdays and it now doesn't respond to that. Not sure how old it is now but probably 2-3 yrs or so (1.66 gHz duo with 2 gigs of RAM). I have done the usual software maintenance things with Applejack and Onyx and can't think of a particular reason why it might have started this behaviour. In itself it's not a big deal but I am concerned that it may indicate something more sinister going on with the operating system. It seems otherwise to be working fine. It's had a lot of hard work but it's been a great little computer. Rifty  Signatureriftynet - put a dot after rifty > I have a MacMini (OSX.4.11) that has decided it won't turn itself off > fully without my pressing the button at the back after it has shut [quoted text clipped - 10 lines] > > Rifty Hi Rifty, Have you tried resetting the PMU? http://docs.info.apple.com/article.html?artnum=300574 (This also resets the PRAM) It's unlikely at 2-3 years old, but perhaps a flat PRAM battery? http://docs.info.apple.com/article.html?artnum=86181 I've no idea how difficult it is to replace the battery in a Mini, as I've only had to do it on an eMac (fairly simple) and my G4 PowerMac (piss easy). If I was a betting man, I'd be willing to bet that the problem lies somewhere within PMU settings. Andy. > > I have a MacMini (OSX.4.11) that has decided it won't turn itself off > > fully without my pressing the button at the back after it has shut [quoted text clipped - 29 lines] > If I was a betting man, I'd be willing to bet that the problem lies > somewhere within PMU settings. That all sounds logical, Andy, and I would have put that on my list of things to do next had not a different solution apparently came about. I shifted the MacMini when I needed to connect it to a 46" HD TV and discovered there was a fair bit of fluff and dust and stuff round its fan intake, so gave it a thorough vacuum and clean. What I think was happening with the unusually warm weather we were having, and the fact that it was in a fairly airless spot, was that it was overheating and was wanting to fan itself more to get to a lower temp before actually turning off completely. (I think it 'forgets' to turn off actually in that case). My pressing the button after a few minutes apparently meant that it interfered with the morning startup. It worked fine last night shutting down and this morning starting up. So it appears that if they overheat a bit, they don't like it. This might be helpful to others if they find the same thing happening. Vacuum them down! I did wonder about a flat battery but that surely wouldn't have stopped it shutting down properly. (Incidentally, have you ever seen what they look like on a huge HD screen? - fantastic!) Rifty Signatureriftynet - put a dot after rifty <snip> > I did wonder about a flat battery but that surely wouldn't have stopped > it shutting down properly. Oh, it surely can. All sorts of bizarre sh.t can happen with a flat PRAM battery, especially if the PMU gets a bit borked. > (Incidentally, have you ever seen what they look like on a huge HD > screen? - fantastic!) Nope, but I'm planning to buy a 24" Acer LCD screen to replace my crappy old 21" CRT :-) Glad that it seems to have sorted itself out, anyway. Cheers, Andy. > > I have a MacMini (OSX.4.11) that has decided it won't turn itself off > > fully without my pressing the button at the back after it has shut [quoted text clipped - 6 lines] > > http://docs.info.apple.com/article.html?artnum=86181 I think you're right: it sounds like it could be a flat PRAM battery, plus it's cheap to replace to see whether it fixes the problem. Ben. |
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