On 26 January 2013 14:30, Rob Malpass <linux@???> wrote:
> Hi all
>
>
>
> My dad (an electronics engineer of 40 years experience) once told me
> “intermittent faults are a swine to fix” – and never truer words were
> spoken. Could you all please take a look at my logic before I condemn
> certain parts of this failing box to the bin?
>
>
>
> 2008 vintage 64-bit 4Gig RAM machine running Ubuntu 12 fine for the past
> month – 28 days uptime as my media server and no problems at all. Today I
> switched the kvm box controlling it to control another machine (no
> disconnection, just a flick of a switch) and the box powered down! For
> some reason whenever the bad box powers down, it needs to be physically
> unplugged from the mains before it will come back up – this particularly
> baffles me. Brassed off with this, I started to look into what causes
> random shutdowns (it’s not the first time it’s done this but as I say it’s
> been fine for 28 days). I left it running for 20 minutes in BIOS to check
> the CPU temp was fine – and it was at 44 degrees C max. Rebooted to see
> what dmesg might say but – post BIOS but before boot – it shut itself down.
> And at that point my anglo saxon became taboo for the good folks on this
> list!
>
>
>
> I’m now stumped and, as the machine is 2008 vintage (though good for its
> time) it might be time to upgrade – but I’m wondering which bits I can
> salvage. I’m thinking the following are ok to reuse: case, optical drive,
> hdd whereas any of the mobo, RAM and certainly PSU could well be the trouble
> and it’s almost impossible to test which.
>
>
>
> Can anyone offer another diagnosis / treatment for these symptoms? I might
> be inclined to buy a new PSU and see what happens swapping that before any
> more major surgery but is there really anything I’ve missed as regards
> seemingly random shutdowns? Incidentally when I say shutdown – I’m talking
> immediate power down – not the OS executing a halt command.
>
I suspect a faulty KVM box.
Try disconnecting the KVM box entirely and boot up with a keyboard
connected directly to the problem box, and not via the KVM.
--
Please post to: Hampshire@???
Web Interface:
https://mailman.lug.org.uk/mailman/listinfo/hampshire
LUG URL:
http://www.hantslug.org.uk
--------------------------------------------------------------
