9.0 spontaneously reboots
noc at hdk5.net
Mon Mar 12 19:56:10 UTC 2012
Matthew Seaman wrote:
> On 12/03/2012 14:07, Volodymyr Kostyrko wrote:
>> What should I blame now? Is it some programming error or should I
>> continue with testing/changing motherboard and cpu?
> Instability that appears spontaneously (and especially if it persists
> across system updates) is almost always caused by hardware problems.
> So, yes, carry on swapping out components until you can isolate where
> the problem is.
> Some common hardware problems which might result in the problems you've
> * PSU going flakey. If you have the right measuring equipment, this
> is pretty easy to detect by looking at the output voltages -- if
> they've drifted out of spec, or if you've got mains frequency
> jitter leaking through then its no wonder your system crashes.
> * Similarly, if the crashing is associated with system load,
> (particularly at startup, when things are happening like disks
> spinning up) this can indicate a power supply fading under load.
> That can happen due to age, or because you've been adding extra
> hardware and haven't considered the power requirements.
> * The other reason for crashing under load is overheating.
> Sometimes this can be cured easily by cleaning dust out of vents
> and heat-sinks. Check too for fans either seized or running
> * You may need to clean off any old heat-sink compound and re-apply
> a fresh layer, especially if you've taken CPU coolers off at
> some point.
> * There's also the old capacitor problem: electrolytic capacitors
> have a failure mode that generates some positive pressure inside
> them. This is detectable by the end of the capacitor being bowed
> out, rather than slightly concave. (Generally this means a new
> motherboard, although I've heard of people being able to solder in
> replacements successfully.)
> Other than that, try disconnecting and reconnecting peripherals like
> disks or DVDs and so forth in various combinations to test if that
> improves system stability. One faulty component can knock the whole
> machine over.
Have seen the problems Matthew is addressing here in Hawaii. And
if your equipment is in a non climate controlled room check for
corrosion on the board or any plugins. Clean all the cabled and
components that can be removed. (No air-con in my systems here in Hawaii
and humidity is around 60-70% normally so we have to clean and put
teflon on contacts about 2 times a year.) Corrosion is worse if your on
the ocean or brackish river.
~Al Plant - Honolulu, Hawaii - Phone: 808-284-2740
+ http://hawaiidakine.com + http://freebsdinfo.org +
+ http://aloha50.net - Supporting - FreeBSD 7.2 - 8.0 - 9* +
< email: noc at hdk5.net >
"All that's really worth doing is what we do for others."- Lewis Carrol
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