Yes, mine started happening when I got s new box from Comcast. I’ve done experiments over the last couple weeks. I’ve determined that it doesn’t require a cable box reboot. It is an HDMI handshaking issue that appears to be broken when the daily update is done. Just plain poor software execution and regression testing by the Comcast software team. What I found that works is to unplug and plug back in the HDMI cable from the cable box. This te-establishes the handshake and the picture comes back in. I recently found an even easier way. I also have a receiver (Yamaha) between my cable box and Visio TV. They all power up together. When it comes up with black screen, I can turn the receiver off and then back on. This also must refresh the HDMI handshaking. I see the picture glitch when the receiver comes back on and then a few seconds later the picture appears. Hope this helps others. It is still annoying but no hardware needs to be unplugged at least. Come on Comcast. Get your act together! I know you are watching. How about a response?
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Ok, I have done a couple experiments in the last two days with interesting results. I’m honing in on it and will get to a solution but I’m not there yet.
I have the non 4K box. I have HDMI going through a receiver to my TV using ARC HDMI port. Here is what I did.
1) Disabled every available programmable feature.
Result- Black screen and no picture after daily update
Action 1 - unplugged and plugged back in the HDMI cable.
Result- No change
Action 2- unplugged and plugged back in the RF cable on the back of the box
Result-Picture came back
Conclusion-Box does not have to be rebooted
2) Next day - unplugged HDMI cable before I went to work. Daily update occurred.
Action 1- Plugged in HDMI cable. Then turned on TV.
Result: No picture.
Action 2- Unplugged HDMI cable and plugged back in.
Result: Picture came on after a slight delay
Conclusion: Hmmm. May be an HDMI handshaking issue. Also picture came back after delay, so I’m wondering in day 1 if I didn’t wait long enough
Bypass received and go straight to TV with Comcast provided HDMI cable.
After daily update, if no picture, change HDMI port on TV and then switch back. Determine if pic comes back. If so this may be an acceptable compromise. If not, I’ll unplug HDMI and plug back in. If that fixes it, I may try using a non ARC Port. Not sure where to go if that doesn’t work. I’ll get my old box back!
Maybe someone else can try some of these to see if they work on the 4K box. Wonder why they didn’t give me a 4K box!
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If it is an HDMI issue, then you should be able to unplug and plug back in the cable to bring back the picture. That would indicate an HDCP handshake issue. I doubt that is it, but I’ll try it tomorrow when my box bricks again after the daily update. I also turned off just about every feature on the box that is programmable so will see if that does anything. If not, I’m taking the box back and getting the non-X1 box. I have a Vizio TV and my box is X1 but not the 4K box. I am using the same HDMI cable I was using with my old box that had no issues.
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I see this with my box as well. I just traded in my old non X1 box that performed well for the last 5 years. My first X1 box was DOA as was the second. The third box worked. Every morning I have to reboot the box to get a picture. It isn’t the cable and it isn’t the TV. I figured out it is after they do the daily updates. Every time Comcast remotely accesses the box for their daily whatever, it bricks the box. I changed the time from 4 am to 2 pm and when I got home from work today, it was bricked. It follows the daily update time. It is likely a software issue that is not compatible with the hardware. This should be something they should fix ASAP or there will be a lawsuit against them. It is unreal. I’m going to turn off as many features as I can to see if there is some feature incompatibility during the daily updates that is causing the issue. I doubt it though. Probably need a different model box, like maybe my old one, that will fix this. Techs and calls to service won’t get you anywhere. It is a software/hardware compatibility issue thatgot past their quality control testing, if they do any.
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