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Plug Treadmill into wall outlet.
Is green +12V lamp on the motor
control board lit?
Upper display fails to light when START is pressed.
1. No power from outlet.
2. Loose wire from line cord to motor
control board.
3. Blown SLOW-BLOW fuse on motor
control board. Part # MDA-20 (110V),
MDA-15 (220V)
4. Failed motor control board.
Part # 70080 (110V), 70081 (220V)
Press START button on membrane panel.
Is green +5V lamp on the motor control
board lit?
1. Check connections to control
harness. Part # 70083
2. Replace motor control board.
Part # 70080 (110V), 70081 (220V)
Is red SERIAL lamp on the motor control
board lit?
Replace motor control board.
Part # 70080 (110V), 70081 (220V)
Replace display board Part # 70076
NO
YES
NO
YES
NO
YES
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