Stuart, pull the plastic panel off at the bottom of the front of the machine and you will see a tab to pull and this will open the door. Sounds like you need a new main module (back of machine). We stock them at 53.88 + 6.00 post (exchange). Get the iinfo we need at www.mawdesign.com/tech/info.jpg
& then call us on 01159652118 Tony EMW Electronics
Tony, January 2015