> > My GDO is acting like there is something blocking the door--it won't
> > shut unless I hold the button down.  I am assuming the electric
> > eyeballs have become misalligned, and I will look up how to re-allign
> > them, but my query is whether it might be something else?

> It might be a switch problem or there could be something binding the
> mechanism.  You might want to try  disconnecting it from the chain
> (assuming it's chain driven) and opening and closing it by hand.  If
> it's difficult to move or binds, you should notice.

> Put it all the way down and give each of the rollers a check (and a
> squirt of grease while you're there).  I used to have this massive
> wooden garage door and one of the brackets that holds a roller on was
> loose and that roller would bind.

> Get a ladder and look at the sprockets on both ends of the chain.
> That same massive door had a plastic sprocket on the wall end was
> destroyed.  I replaced it with a metal sprocket and tada!

> But, by all means, check the eyes.  I'm not sure how one goes about
> aligning them.

> And that's the sum of my garage door expertise.

> a.