How can I fix my treadmill?

I bought a X-FIT Motorized Treadmill from Cyber Checkout via Ebay in August 2004. Until now it has been a splendid piece of kit. However, now I’m having some difficulty with it. The LCD is not working but that is not a great problem. It will not work on maual. I have to keep the fast button depressed for it to start up and when it does it only goes so fast and then slows right down, which is not satisfactory. Do you know of anyone in the UK that may be able to service and repair my machine or do I need a whole new console.