Tired of Power Cycling my cable box

My picture displays the digital lines across the screen.  The audio is interrupted.  Sometimes, when I change the channel - it won't go!  It stays on the existing channel.  I tried to reset using the online tool.  It didn't do anything.  No reset.  When I tried again, it told me I was trying to reset multiple times.  Between the TV and needing to reset the modem daily, we are not happy with the Cox service.

Model: 4742HDC