My Treadmill Has A Mind Of Its Own

I baught the treadmill around 4 years ago. The main purpose is to let my family members (especially Farhana) be able to do some exercise in any weather and lose some weight. The machine started to have problems since last week. The machine will work pefecly in the morning but in the late afternoon it won't start.

I've tried many tricks to start the machine but it all depands on luck. The same "touch here and there" will not give the same result. Lastly Anum, Farhana and myself put the machine into my crv and