Warning: This resets the odometer to zero. Record your lifetime miles first if needed.

: Unplug the unit for at least 10 minutes to reset the control board.

To get started:

Before buying a new board, check the small glass fuse near the power input on the board (original manual does not mention this). It’s a 5A 250V fast-blow fuse. Replace it for $0.50. Nine times out of ten, this is the fix.

: Press the Start button; most models have a 3-second countdown before the belt moves.

It looked like it had been through a war. The pages were dog-eared, and there were coffee rings on the front. But as Elias flipped it open, he noticed something odd. This wasn't just the factory manual. Someone had gone through it with a black marker and a pen.