Black bars on TV
I upgraded my equipment to XB7. I have one DVR box and one TV box. After activating my DVR box, the TV box would not activate. It started working the next day and I was able to activate it. Then as the days went on, I kept receiving RDK03036 error messages on my TV box. A tech came out and installed a filter on my outside cable line. Since the filter was installed, both my TVs now have horizontal and vertical black bars on many of the channels. Plus the HD resolution on many channels seems to be degraded as well. I had full screen on all my channels before the filter was installed and also had very good HD resolution. Why did this happen and what can be done to fix it?