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Intermittent Black Screen
I have the latest devices. I have a DVR box in our kitchen that appears to be our main box. Periodically - maybe every 3 weeks all of the sudden the screen goes to black for a second. And it happens every 5 seconds or so. Blinking on and then off. I unplug everything, let it sit for a while and restart. Sometimes it will be back to normal for a while, sometimes the problem persists. I have had this problem with older equipment too. In order to troubleshoot that it isn't the television I have bypassed the box and watched Netflix through the web services with Samsung. There is no blanking of the screen. It works perfectly. If it was wiring wouldn't it consistently demonstrate a problem? We have 3 other televisions in this house with the small boxes behind the set. We never have trouble with those. Thoughts?
R_Aster
Contributor
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50 Messages
4 years ago
Stephanie,
I have seen this behavior if the HDMI input on the TV is set to 'enhanced' or something similar. So you could look for input settings and see if changing it to standard (or vice versa -- this is all pretty much voodoo) helps.
Also, an iffy HDMI cable can cause this. Don't go to Best Buy and waste money on a new one if at all possible -- just try to swap in a another one you probably have under your bed or in your sock drawer or wherever. See if that works.
Um, you could have a bad signal that is most affecting that one TV. You should do the usual and loosen/tighten the RF cable on the back of the Comcast box and also at the other end, probably a splitter somewhere in the house. There is an app somewhere on the newer X1 boxes to check signal stength, not too clever but you could try it. You'll have to Google it -- forget where it is buried.
Good luck.
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XfinityAmira
Official Employee
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3.8K Messages
4 years ago
Hello @stephaniehench, thanks for reaching out to us on our Forums page about this cable box issue you have been experiencing. We apologize for the delay in getting back to you but you have reached the right team to assist. It could be a wiring issue or an issue with that specific box. If the helpful suggestions the previous user provided did not help correct this issue, we would be more than happy to help.
Can you please send me a Private Message including your first and last name as it appears on the account? To send me a Private Message, please click my name “ComcastAmira” and click “Send a message".
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