AT&T 5620 questions

[Doug Gwyn]

In article <14223 at s.ms.uky.edu> david at ms.uky.edu (David Herron -- a slipped disk) writes:
>Ages ago I had someone tell me they simply replaced the memory chips
>and everything just worked.

I think some newer 5620s already had faster timing chips on board,
so that chip didn't need replacement.

>Ages++ ago I tried using the official 1Meg upgrade to upgrade "my" 5620.
>Oops..  didn't work.  And we didn't try tracking down what was wrong.

It worked fine for us, on a couple of dozen 5620s.
Maybe you didn't ground yourself before working with the static-sensitive
chips?