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?

Yes I too have been surprised by the E420r in the past.
As someone already mentioned the empty slots require a "blank"
CPU placeholder for correct airflow. Incorrect airflow would likely
cause MORE heat generation defeating your rather dubious original
intent!
Disassembly/assembly of the 420r requires a fair amount of caution
and CPUs need a special torque wrench for re-installation.
In short these boxes should not be monkeyed with : <
If you havent cracked any traces or something, careful reassembly
should get you back on line. Until then think of all that power you
have saved.. : /