On Tue 21 Oct 2014 16:02:53 NZDT +1300, Barry wrote:

> Every so often the box just stops and screen freezes.

Hardware error. The tricky part is to find the faulty component.

Please run memtest86+ for at least one full iteration, several if you
can.
There is a program called memtester which you can run while the box is
running. It allocates physical memory (as root) and lets loose on that
chunk. If it finds a problem you know there is a fault in the memory
system (may not be the memory module!), but not at which physical
location. If your box goes stone dead when starting memtester you know
you have a problem, and it's not the hard disk.

Beyond that you're pretty much into replacing components until it
becomes stable again.

Recently it took me ages to find the problem causing exact same
symptoms. It was a faulty memory system, but the memory modules were
fine, so I had to upgradeA^H^H^H^HA^Hreplace CPU + mobo (what a shame).

Volker

-- 
Volker Kuhlmann
http://volker.top.geek.nz/      Please do not CC list postings to me.
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