[#4] Treadmill Fixed by Replacing Speed Sensor

The treadmill was dead when it was given to me by a very generous friend. One other tech attempted a repair and he suspected the board was faulty. I checked the board myself and couldn't see any clue. When I checked the speed sensor with multimeter and a magnet, I was able to verify that it was faulty. I ordered a new sensor, which was just a reed relay with a normally open contact. I replaced it with the old one and the machine kicked into life. An easy fix!