I assume you ran a digital cable from the Motorola to your receiver? if yes, you need to go into the menu on the receiver and change your tv setting to that digital input on your receiver.

i just had the same issue a few weeks ago when i got my new Pioneer tv. Really had ntohing to do with the tv, but i was running analog cables from my cable box to my tv. I decided to run a digital cabel instead, so i had to change the tv input to that digital input on the back of the receiver.

hope i didnt confuse you even more