Temperature could indeed be the case. The last time it happened was during heavy load. The fans are spinning, that I checked already. I will add temperature monitoring as well to the logs. Dirt could be, but this machine is not even a year old. I'll check the CPU cooler assembly. Thanks, Theo Dave K wrote: > This bounced when sent to the list, so I'm copying you directly. > > ---------- Forwarded message ---------- > From: Dave K <davek08054 at gmail.com> > Date: Jan 18, 2007 1:37 PM > Subject: Re: [CentOS] Machine all of a suddens freezes. Any suggestions? > To: CentOS mailing list <centos at centos.org> > > > On 1/18/07, Theo Band <theo.band at xanadu-wireless.com> wrote: >> ... It freezes and cannot be accessed from the network.... >> ... >> My feeling is, this must be a hardware related problem. I inspected the >> logs under /var/log, but nothing. >> ... >> What would be the best approach to debug this problem? What can be the >> most likely cause? > > The first thing I would suspect is some sort of cooling problem. > Verify that all of your fans are actually spinning. If the BIOS has > the option to always run the fans at full speed, try it for a while > (if you can stand the noise). Use a flashlight and check that the > airspace between the fins of any heatsinks aren't clogged with dust. > If there is room (and power) for additional fans, try adding one. > > The last system I had with "random" freezes runs fine now after a > replacement CPU fan, an additional case fan, and suitable application > of half a can of air-duster. > > -- > Dave K > Unix Systems & Network Administrator > Mount Laurel NJ > >