I have Direct TV, and reset my system when the captions disappear or become hard to follow. My TV and Direct TV are plugged in the same extension and I turn the power off to both for about a minute. When they come back Direct TV checks for updates and checks my system-takes a few minutes. The captions reappear and all is well for a while until it starts to do it again. My receiver has not been replaced in at least 5 years, and it may be the reason I have this problem.