Send the main module (in the back of the machine at the bottom) for test. Repair is £59.88 Test is £1.20 Postage £6. Send it to EMW Electronics, The Barn, Millfield, Oxton, Notts, NG25 0TD Tel 0115 9652118 Include model number, note of fault, daytime tel no. Our website is www.emwelec.co.uk