DVR box sound disappears for hours or days and then returns for hours or days

L

latichever

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#1
For the past few months, I've had sound on all channels disappear for hours or days and then mysteriously reappear for hours, days, or weeks.



The audio problem is only on the input for the DVR box, not on the input from my Roku. So, it's not a problem with the TV



I've done all the standard troubleshooting and a comcast phone agent did a "health status check" and said everything's fine coming into my house.



I have another TV on a non-dvr cable box and this one never has the audio issue.



I've swithed the hdmi cable to a different input on my TV and is not a fix. I will swap in a new cable but I don't see how it could be the hdmi cable. If that doesn't work they'll send me a new DVR box.



Should that fix the problem. Or is there anything else I can try?



Thanks.



Update: okay, this is weird, the sound was working, put it on mute and left for a while, came back, and no sound. But still sound on the roku input, which I can mute/unmute with the xfinity remote.

"DVR box sound disappears for hours or days and then returns for hours or days," is about XFinity-Comcast Television.

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