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Re: NaN Magic or Why Me?! [message #56824 is a reply to message #56761]

Wed, 14 November 2007 09:56

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Rick Towler writes:

> Since you code runs fine on 2 out of 3 computers the problem most likely
> is hardware based. Since you've swapped your SO-DIMM, and this is a
> laptop, you don't have many options left.
>
> RAM->BIOS->Heat->Power
>
> Even late in a processor's life cycle, there are a number of "errata"
> that exist. Generally workarounds are implemented either in the BIOS or
> in the OS. I would get the latest BIOS available for your laptop.
> Also, try disabling hyperthreading in the BIOS. You never know...
>
> If your processor has active cooling ensure that the fan and heatsink
> are clean and that the fan spins freely. If this is an actual P4 650
> "Prescott", aka Pres-Hot, heat is a real issue. Stick it in the
> refrigerator while you test it.
>
> Power issues are tricky to diagnose in laptops but if the above steps
> don't help, and you tend to get errors while the system is loaded, there
> could be components in your AC/DC adapter or the regulators on the
> mainboard that are marginal. All you really can do is look for obvious
> defects like bulging or leaking capacitors or swap the adapter if you can.

I wonder if this is the appropriate time to mention that those
new Macs look pretty darn good! :-)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		NaN Magic or Why Me?! By: Mort Canty on Tue, 13 November 2007 09:42
		Re: NaN Magic or Why Me?! By: Mort Canty on Wed, 14 November 2007 23:34
		Re: NaN Magic or Why Me?! By: Peter Mason on Wed, 14 November 2007 16:47
		Re: NaN Magic or Why Me?! By: Mort Canty on Wed, 14 November 2007 10:06
		Re: NaN Magic or Why Me?! By: David Fanning on Wed, 14 November 2007 09:56

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