Treadmill fix question

so i was given this treadmill from a guy that said it doesn't work. I assumed it was because he didn't know he needed the safety key. Well i ordered one and went to use it thinking that would fix it and the result i get is the same as when i didn't have the safety key. I plug it into the wall and it will light up for a split second, about as long as the beep is when it powers up and then shuts off. What could it be?

the treadmill i have is a Nordic Trak C2200

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