my tx 400 sportcraft treadmill guit working with 8 as an error code. works at a high rate of speed only, if you mess with the emergency disconnect, but no display other than 8 in the speed/calories window. customer service was rude & told me to lube the belt. I didn't expect it to work & it didn't. can anyone give me a heads up on what to look for? thanks

whitey, January 2009