Date: Thu, 1 Jul 1999 16:40:28 +0100 From: "Bond, Jeffery" <Jeff.Bond@nectech.co.uk> To: "'questions@freebsd.org'" <questions@freebsd.org> Subject: Re: Hardware destroyd. Any clues ? Message-ID: <DD2AB7991BC6D211988E00A024AC583B83EBF4@exchange.nectech.co.uk>
next in thread | raw e-mail | index | archive | help
I would make a bet that it _IS_ possible to kill a CPU via software. If the BIOS in the motherboard is a jumperless one (like most now), then software can write to the clock configuration chip (whatever that may be) and alter the CPU clock or divider ratio. (Just like the BIOS setup program can). Obviously, overclocking can kill a CPU, not just from overheating, but from electromigration. Anyway, back to the problem. I doubt if FreeBSD killed the CPU too, but a crash could scramble the CMOS. Stefan, does your PC with the 'dead' CPU give ANY messages when you power it up, e.g RAM test. Maybe the CMOS has got scrambled. Try clearing the CMOS with the motherboard jumper, or temporarily disconnect the back-up battery, (Try sliding a piece of paper under the contact if it's a coin cell). Hope this helps, Jeff Patrick wrote: >Stop using that motherboard! Try putting a functional CPU (test it first!) >into a functional motherboard (test it first!) and then try starting that >computer with another operating system on it. Then switch the hard drive >and put the one with FreeBSD on it in, and boot with that. > >This is definately not a FreeBSD problem. As far as I know its completely >impossible to kill a CPU via software. > >You might also want to make sure the motherboard is not touching the case. >I had a case with a removable drive enclosure that, when pushed back, >would meet two jumpers in exactly the right position and ``connect'' them >togeather, therefor disabling the motherboard. > >Tell your motherboard company to shove it. A motherboard has no choice >what OS it runs if the OS has a supported distribution for it. If it IS >the motherboard that is burning out the CPU's, make them replace the >motherboard AND pay for the damage. > >Hope this helps, >- -Patrick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?DD2AB7991BC6D211988E00A024AC583B83EBF4>