I've done a bit of work and put a new chip in (ULN2803) I switched the machine on and checked the switches with the jumper with similar results as before. I switched the machine off to check the board, put it back on again and now it's telling me to check fuses 114 & 115, I done that and they're fine, also 2 of the 4 test switches aren't working. Anyone have any ideas.