Ok, I checked the tv, it works fine with vcr, so the pic and audio is good. the box is functioning, changing channels and such. the guide comes on to tell you what is on at that time and shows current, but no picture or sound....whats up with this??? I am in FL. Thanks for any help!
Not sure if it the same problem but here goes...
Today my DVR box would only show Local Network Channels, everything else would show in the guide and allow me to change channels but the Sound and Video would snap to black within 3 seconds on just about every channel. Currently Unavailable.
What was strange was that my other non-dvr box had no problems. So I new it was an issus with my DVR box.
My fix it worked:
Pull the power cord out of the box. Wait a few seconds and plug it back in. You will see a rebooting screen. After that everything worked.
Hope it helps.