Bell

It's something to do with the mouse on mine.  I can select channels with the original remote that came with the monitor.  Don't know if that will help you.

I have checked all of these things.  I can't open the channels from the home screen either.  It's not just the guide.

I am having the same problem.  That does not work.

I am having the same problem.  Did you manage to resolve it?  I have tried everything on the replies and none of it works.