On Thursday, November 13, 2003, at 03:54 PM, Jeff Walther wrote:
Identify the power pin on the memory chips. Now, unless the memory chips are 'J' lead, it should be possible (with careful soldering) to lift the power pin of the memory chips one at a time. This will completely disable that chip and by observing the affects you may be able to determine which is the faulty chip.
Not a bad idea Jeff! Except that now the chip has no power, and it's inputs are being driven. The typical ESD input protection circuit may well pull down the address/data bus and prevent any of the memories working properly. Maybe there is a chip select pin that could be disabled instead.
John
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