name='Ham' said:Where have you put the power & reset switches?
Simple, we open the boxes with a key and ram a screw driver between the two pins on the motherboard

Joking aside we have a reset switch attached to the pins, just means unlocking each of the boards to press it, all the PCs are set to boot on power fail so it's quite rare we have to ever open more than 1 or 2 at a time
For teacher machines like the staff room we just have the reset switches coming up the back hole in the desk so anyone can press them