Tek wrote:
>
> Hello Guys,
>
> What is the right way to check for defective RAM chips?
The best way, really, is to take them out and put them into a known-good
system and see if it makes it screw up. I've got several stand-alone
memory chip testers at my workplace, but it's a good idea to test a
questionable chip in more than one test fixture, if possible. Not all
of them use the same algorithms. All test equipment will lie to you at
some time or another.
Just because a RAM chip is receiving address and data bits, that doesn't
necessarily mean it "keeps" what it's supposed to. Therein lies the
problem. A built-in RAM test sends a known pattern of bits to the RAMs,
then reads it back and compares it. If they don't match, the software
identifies the bad bit and tells you which RAM chip that is.
Supposedly.
HTH,
Matt J. McCullar
Arlington, TX
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Received on Tue Apr 25 01:09:56 2000
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