Bruce C. Miller wrote:
> I have a E420R with 4x 450Mhz CPUs. In an effort to conserve power and
> air conditioning in my computer room, I decided to yank two of the
> CPUs.
>
> According to the manual, running a E420R with two CPUs is fine, but you
> have to remove CPUs 0 and 3, which I did, leaving the two middle CPU
> modules. Upon rebooting the server, I get a blank white screen. No logo
> in the upper left. Nothing. I thought maybe there was some kind of
> jumpers or something I might have missed, but there is no mention of
> anything of the sort in the manual. It does recommend putting blank
> placeholders in the empty CPU slots and I don't have any of these,
> however it's hard for me to imagine that they do anything.
>
> Any thoughts?
>
> What's worse is that putting the two removed CPUs back and restarting
> results in OpenBoot starting up normally, and then freezing after the
> memory scan. This computer worked fine prior to this!!

I'll also add that with a single CPU (in slot 1) it boots up to the
"Initializing Memory" stage and then hangs as well. I tried setenving
the diag-switch to true and then watching it carefully after resetting,
and everything seems normal. The memory counts down to 0 and then the
system freezes and is unresponsive to input.