Unit was in storage for five years and was put back in service. It ran for two months without issue and now throws an E5 Speed Sensor message. I was able to check the SS541A Hall Effect sensor and replace it with an equivalent 3144 Unipolar sensor with the same result. It appears there may be a problem on the PCB, a solder connection, or a component. This has been a great treadmill and I\'d really like to get it going again. I believe the PWM drive is still fine as is the drive motor. Please advise on my options and Thank you.