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
Planned experiments:
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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