Thus spake Andrew Carey:
> 
> Herb Peyerl <hpeyerl@beer.org> wrote:
> > Are you sure that works with the 400*s*? I know it works with the
> > 400t because I've done it.  I've also done it with a 345... But I
> > have a 400s at home and I've tried to do this but after I do the
> > upgrade, the power-supply won't even come up. ie: no fan.  It's 
> > like it's seriously unhappy... Yes, I've checked orientation of the
> > CPU and Crystals, etc... 
> 
> For the 400s, the upgrade path is:
> If the 1LY3 chip is revision -0304, the cpu, crystal, and boot
> rom are replaced.
> 
> If the 1LY3 chip is not revision -0304, it appearently takes a
> full cpu board replacement.
> 
> The 1LY3 chip is located above the cpu and forward of the ram 
> slots (when looking from the back) in position U56.

Hmm... It appears then that I have no hope of doing an upgrade.
I've got -0301 chips in my machines.

Ron