On April 15, emanuel stiebler wrote:
> Just tried to upgrade my 4000/400 to a 4000/600.
> 
> Nu success :-(
> 
> I guess, it's simply exchanging the CPU boards, right ?
> Anything else to do ?
> 
> The new board just stucks with an "F" on the LED.

  Doesn't the 4000/600 use different memory?  I'm not sure about this
at all, but I seem to have this very vague recollection that it does.
Perhaps faster memory?


        -Dave McGuire