Cybex 625T E3 only goes 0.5 mph

I acquired a Cybex 625T E3 knowing that it did not fully work.   After playing with it some, I got it to fully fire up but the speed seems to be locked at 0.5 mph.   Even after pressing the speed control +, it does not change the speed or even beep.  The incline control works fine and raises/lowers the treadmill (it makes a beep noise too). Given how I am not sure this unit is worth much, I want to be very judicious about what I sink into it.   I believe it might be the motor controller but would like to be more sure - even a rebuilt one is close to $400 (a new controller is $785 from LifeFitness).

\-I have ensure it is running the newest software

\-I  have ensured that the speed limit is set to 12.4 mph

\-No speed sensor errors in the log

\-I believe the speed controller +/- is not faulty

Are there other items I can deduce? Do I need to call a technician?

Serial Number : **J0718-625TX050N**        Model Number: **625T-E3-01**