When I turn it on the display shows FF -- I have tried turning it off and unplugging it from the electicity.
SOURCE: Have proform 850 elliptical, unit jerks at bottom of travel
This is caused by a loose crank arm. The key assembly is loose. (#32 on your parts list) The covers will need to be removed to access this. Be sure the crank arms are realigned against the frame when completing the repair. Good luck, Tim
SOURCE: Just bought my Proform 490 LE elliptical 1 day ago
If you purchase from a store I would take it back and exchange it, or if you purchased it on line then the manufaturer and have send somebody out to take care of this situation you have a warraty on the unit
SOURCE: On my proform 680LTwhen I put the key in I get an FF display and nothing works
You must to the following:
Adjust the Sensor Reed, or optical sensor. by 1/8" or 3mms if see the diagram.
If after adjustment the problem persist. You must Test or measure the voltage for +5vdc to I.C.( EPROM, ROM, etc) , coming up from the Lower Board( Main Controller Motor Board).
Re-connect the flexible cord between Upper Board(Display) VS. Lower Board(Main Controller Motor Board) .
After you did that the Display Board is faulty or Main Controller Motor Board is faulty Replace.
Of course try to use the Dvoltmeter. very important.
sincerely.
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