how do you set a trap computer to explode?

I've placed a TrapComputer+TrapComputerBack, linked them to each other and set a Persistent Reference on both; when I try it in-game, I get the short-circuit thing but then no explosion occurs .___.''

Thats all you need to do.

They 'must' have the 'Linked Ref' tab pointing to each other correctly.
They 'must' also still have the script attached to them (in case you made new objects).