Ewan Sinclair wrote:


What precautions should I take before opening it up? Please err on the side
of paranoia in your advice; I only need to do this once and I *really* don't
want to go to hospital over it :-)

There are two capacitors in the PS that are charged to about 320 V DC (in
series).
These each have "bleeder" rsistors, to insure that they will discharge in a few
minuites. Actually, about five minutes should be enough for them to discharge
to a very safe value. If you're really paranoid, unplug it overnight.

Be careful you don't burn yourself if soldering the fan wires!

Virg Wall
--
A foolish consistency is the
hobgoblin of little minds,........
Ralph Waldo Emerson
(Microsoft programmer's manual.)