Replaced iMac HD - now fans constantly on
in [UK Mac]
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From: Jaimie Vandenbergh on 25 Mar 2010 15:00 On Thu, 25 Mar 2010 15:35:19 +0000, Chris Ridd <chrisridd(a)mac.com> wrote: >On 2010-03-25 15:10:41 +0000, Jim said: > >> On 2010-03-25, Sara <saramerriman(a)blueyonder.co.uk> wrote: >>>> >>>> Could be a software issue - which OS version? >>>> >>> Nothing - it's a new HD, no OS, no software. I'm going to boot it of the >>> install disk in a bit and see if the generally despised hardware test >>> proggie thing says anything. >>> >> >> Is it possible that that's normal when there's no OS? No OS has implications >> of no power/heat management. I see that a bit on PCs - the fans are on full >> until the OS has booted beyond a certain point, then they calm down. > >Exhibit A: HP x86 servers. I SAID EXHIBIT A: HP X86 SERVERS! > >They're a bit loud. I discovered (after about 8 months being deafened by them) that IBM's dual-PSU X series servers run all the fans at full speed if you don't plug both PSUs in. Cheers - Jaimie -- "The answer to the second question," said Merry, "is that we could get off in an hour. I have prepared practically everything. There are six ponies in the stable across the fields." -- J R R Tolkien
From: Rowland McDonnell on 26 Mar 2010 02:22 Sara <saramerriman(a)blueyonder.co.uk> wrote: > real-address-in-sig(a)flur.bltigibbet.invalid (Rowland McDonnell) wrote: > > > Sara <saramerriman(a)blueyonder.co.uk> wrote: > > > > > 20" iMac > > > > > > Just replaced the HD and now the fans are running full on all the time. > > > > > > I opened it up again to have a look at the heat sensors and they both > > > (the one on the HD and the one on the optical drive) were barely > > > attached so I refixed them with double-sided tape to the holder, not to > > > the sensor itself. Put machine back together and no difference, lots of > > > fan. > > > > > > I'm wondering if the part of the HD the sensor is attached to is the > > > problem, the old drive had a completely smooth section that it was fixed > > > to, the replacement has all kinds of gubbins on it - by which I mean > > > slightly raised writing and patterns. Could this be the problem? > > > > > > Any other suggestions? > > > > What's Activity Monitor got to say? > > > > Could be a software issue - which OS version? > > > Nothing - it's a new HD, no OS, no software. <puzzled> So if the Mac's not booted, how can you expect the fans to behave sensibly? If the OS ain't running, you ain't got fan speed control and you will therefore have your fans running flat out. >I'm going to boot it of the > install disk in a bit and see if the generally despised hardware test > proggie thing says anything. ??? <shrug> I don't understand... Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: Rowland McDonnell on 26 Mar 2010 03:27 Chris Ridd <chrisridd(a)mac.com> wrote: > Woody said: > > > Chris Ridd <chrisridd(a)mac.com> wrote: [snip] > >> Exhibit A: HP x86 servers. I SAID EXHIBIT A: HP X86 SERVERS! > > > > we have those. LOUD, LOUD, QUIETER, quiet. > > You can tell when they have found a system! > > We've got a DL585 beast that I wished I'd named banshee, because it > sounds like one when it boots, and there's a solid wall between me and > it! The Babbage engine at the Science Museum is very smoothly quiet in operation. Mechanical computing, quieter than electronic computing? Huh? ... Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: J. J. Lodder on 26 Mar 2010 04:52 Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > Chris Ridd <chrisridd(a)mac.com> wrote: > > > Woody said: > > > > > Chris Ridd <chrisridd(a)mac.com> wrote: > [snip] > > >> Exhibit A: HP x86 servers. I SAID EXHIBIT A: HP X86 SERVERS! > > > > > > we have those. LOUD, LOUD, QUIETER, quiet. > > > You can tell when they have found a system! > > > > We've got a DL585 beast that I wished I'd named banshee, because it > > sounds like one when it boots, and there's a solid wall between me and > > it! > > The Babbage engine at the Science Museum is very smoothly quiet in > operation. > > Mechanical computing, quieter than electronic computing? Huh? AFAIK the operating one is a modern copy, and much better built than Babbage's originals, Jan
From: Woody on 26 Mar 2010 05:01
Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > Chris Ridd <chrisridd(a)mac.com> wrote: > > > Woody said: > > > > > Chris Ridd <chrisridd(a)mac.com> wrote: > [snip] > > >> Exhibit A: HP x86 servers. I SAID EXHIBIT A: HP X86 SERVERS! > > > > > > we have those. LOUD, LOUD, QUIETER, quiet. > > > You can tell when they have found a system! > > > > We've got a DL585 beast that I wished I'd named banshee, because it > > sounds like one when it boots, and there's a solid wall between me and > > it! > > The Babbage engine at the Science Museum is very smoothly quiet in > operation. > > Mechanical computing, quieter than electronic computing? Huh? ... An electronic computer that was doing as little as the babbage engine would be silent. -- Woody www.alienrat.com |