Hi, After our old Craftsman GDO stopped working due to a lightning strike, I installed a new Craftsman #139.53918D 3/4 HP Belt Drive GDO .

I worked great for 2 months.

For the past 2 weeks, the opener has a mind of it's own.

It will sometimes, go down part way, and stop, or when the button on the wall controller, or car controllers are pushed, will not work at all.

I have reprogrammed all controllers, but no change.

We called the 1-800 # and they said it sounds like the 'Logic Board' is bad.

They are sending a new one.

Does it sound like this is the problem?

Are these easy to replace?

- Can anyone provide link to instructions?

Thanks.