What model is my carl lewis treadmill?

Hello Im after help, my friend has given us a carl lewis treadmill that isnt new, it folds away aswell.
There is no model number on it anywhere.
OUr problem is the screen comes on and you can select a programme change speed but the belt isnt moving. We have checked the brushes and they look fine. We managed to get the motor to kick in once when we manually moved the belt.
On the motor it says
90 ZYT
DC/Motor
No 605 932

Can anyone help :)