I believe this happened many years ago, and I ordered a part and installed it myself, but I'd like to get some advise. I'm getting an E2 error. I've dusted off the Speed Sensor. All the wires are attached. When I watch the circuit board lights (with the hood off) as I try to start the treadmill, the red Speed Sensor light flashes and then goes off when I get the E2 error. Before I order a part (and where do I do that?), is there something else I should be doing?