Strong Signal from Satellite Finder but no connectivity?

I have a standard receiver I use both in my home and in my motor home.  The motor home uses a Winegard Dish.  I had no connectivity problems prior to six months ago but now cannot get a sat signal.  My dish is at the proper coordinates and my signal finder shows a strong signal.  However, I get the Ext 771 message on the TV  but no programming.  When I go to "check signal", it shows zero strength in each of the transponders.  My off air antenna and cable lines as well as the sat line feed into a splitter before going to the TV.  Is there a possibility the splitter is bad?

Another odd thing is the behavior of the sat finder.  Before, when I was having no problems, the sat finder would light up as soon as I turned on the receiver.  Now, it comes on briefly, but goes off aftyer about 15 seconds following a clicking sound coming from the receiver.  The sat finder will not come on again unless I unplug the receiver and plug it back up.  However, each time it will shut down within a few seconds.  The only time the sat finder stays lit and functions is when the check signal menu is activated.  Is there possibly something defective in the receiver?  That said, I just re installed it in the house and it works fine.

Regards

Dennis