Garage door springs broken?
I have a single door that covers a 2-car garage with a Craftsman GDO. When shutting it Friday night it made a very loud banging noise and now the GDO will no longer open it. I disconnected the opener and I was able to lift it manually, but it was very, very difficult. And when fully open (or at any point) it will not stay there, and it wants to come back down very rapidly.
So I'm guessing I need the springs replaced, or could it be something else? What should be my next step?