I own an Edge 595r Recumbent Bike. When I turn it on, everything appears normal. After about 10 seconds of pumping the display changes to what appears to be an "E-1" and a loud and high sound goes off indefinitely. The only way to stop the sound is to unplug the bike. Do you know what is wrong and what I can do to fix it. We bought the bike about 2007, but have not used it very much, but would like to start using it.