We were watching a show we had pvr'd and it just froze all of a sudden. After unsuccessful attempts to restart it, we tried watching another show from our pvr list, but it wouldn't even start. We deleted those 2 shows, figuring they just didn't record correctly. When we tried to go back to watching live tv, we discovered that it doesn't work either, but we can see the tv listings on the bottom of the screen. How do we fix this, and is there any way to get back the 2 tv shows that we deleted from our pvr, as there was probably nothing wrong with them? It's not the cable, because our other tv upstairs is working fine, but it doesn't have the pvr capability.