On 26/01/13 14:30, Rob Malpass 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.
>
>
>
> Cheers
>
> Rob
>
>
>
> Cheers
>
> ROb
>
>
>
I'd put money on it, that you've a heat problem
My boxes are never allowed to go beyond 36 degrees, before I power off
They all have 2 additional fans - besides the ones they came with - to
ensure component life isn't shortened
BIOS powers off a box which goes beyond critical temperature: the manual
should tell you what the manufacturer considers that to be
Opinions seem to vary quite a bit on this point .. Wonder what others
think about this .. ACRONIS Disc Manager states it is up at 50 degrees !
A short-term fix, would be to take the side off, & put a small desk fan
next to it, blowing cold air into the box, & help dissipate whatever is
causing the pb.
L
--
--
Please post to: Hampshire@???
Web Interface:
https://mailman.lug.org.uk/mailman/listinfo/hampshire
LUG URL:
http://www.hantslug.org.uk
--------------------------------------------------------------
