Some computer integrated circuit boards used to have the reset/reboot button on the board itself and not connected up via wires.
There would be like 3 pins on the board and a connector across two of them.
If things went awry you could reset by moving the connector across and connecting pin 2 and 3 (instead of 1 and 2) then switching on, and-off-again a few seconds later.
If all else fails it might be worth opening it up and having a peer about with a bright torch.
Some boards can actually have some quite useful narrative on them and will say something like reset or rst or even have a row of dip switches.
Edited By ady on 05/10/2011 21:32:32