Cable box is constantly loosing connection.
For a while, our cable box, from time to time, would "disconnect" from the TV (the TV says "no signal") and then reconnect a second or two later. Sometimes after this blackout, the sound would completely go out and I would need to turn the TV off and back on again to get the sound to return. I thought that it might be our TV since it is a little bit older. However, our TV went out and I had to purchase a new one. Now the problem is about 50 times worse. I can't even watch TV from the cable box because it goes off and on every few seconds. I have tired all of the recommended fixes that I could find: I have checked all connections (they are all tight), I have replaced the HDMI cord, I have tried different ports on my TV, I have tired to lower the resolution on the cable box (when I did this, it wouldn't connect at all), I have turned off the setting that automatically changes to the best resolution, and I have restarted the box (by signal and by physically unplugging it) several times. There are times that I can watch for a few minutes in-between blackouts, but they are few and far between. We recently reattached the cord (we didn't have any TV provider for several years) and we are close to cutting it again. We can watch the TV directly without any problem, we can stream video from the TV, play Xbox games, etc. The problem only happens when trying to watch TV on the cable box.