Life Fitness Elliptical 9500hr Repair I Am Trying To Repair My LifeFitness 9500HR Elliptical Trainer?

I am trying to repair my LifeFitness 9500HR Elliptical Trainer? - life fitness elliptical 9500hr repair

I have a life Fitness 9500HR elliptical trainer and monitor the pulse does not work anymore. Do you know how to fix and where can I get parts? The panel reads "0", but he also knows that if I let go because I said, "Hold On".

I really want to do it myself if possible.