commercial opener problem

I have a liftmaster commercial opener for an 18x13 door. Someone hit the track with a tractor and tried to force the opener down afterward etc. So now, when the door is disconnect and I push the open button, the opener clicks but will not retract. However, when I push close, it will continue through the front of the building if I let it. I have readjusted the microswitch for the close position and it makes no difference on the closing, but the opener will do nothing to lift regardless of the adjustment of that microswitch. I am assuming a relay or whatever reverses the motor was burned out but I don't know how to test this. Anyone have an idea?
Thanks
Bill

What model of Liftmaster operator do you have?

Sorry, I have been gone for awhile. The opener is a Liftmaster mt5011. Again, it will close but it doesn't stop even though it opens the contact switch but when I push the button to open it, I get a click but the motor will not turn. I am wondering whether I have two problems instead of just one.
Thanks
Bill

It's possible one of the limit switches is bad or the limit shaft is bent causing the limit nuts to go past the switch. It's also possible the RPM Sensor board is not working properly and may need replaced. It's hard to say without replacing parts and testing the unit. Your best bet is to call a Liftmaster service tech and have them troubleshoot it.
Good luck.....

Thanks for the suggestions.
Bill