XG1V4 box HDMI handshake problem

My X1 box has been acting up. When I turn my TV on, there is no picture or sound. I’m on the correct input and all cords are connected properly. I have found two ways to temporarily get the picture back - 1) If I power off the box and then turn it back on, I get a picture or 2) sometimes (rarely) if I unplug just the HDMI cable and plug it back in the picture and sound come back. 

Here is what I have done so far:

1. I have switched HDMI cords which has not fixed the problem.
2. I have switched out my X1 box which has not fixed the problem
3. I even had a service technician come to the house and suprisingly it failed while he was here.  Unfortunately, the only suggestion he had was to change out the cord, which I did and it worked temporarily, but a week later it started happening again.

This seems to be an intermittent problem that I can’t recreate. It just seems to happen. 

I can certainly check this for you from here if you would like. To protect the privacy of your account, can you provide your full name exactly as it's listed on the billing statement? To send a private message click on my name, then click "Send a message".

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@radnortx1 wrote:
My tech said light won’t go off but box goes to sleep. Today I was good but we’ll see tomorrow.

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Contrary to that tech  My X1 box light DOES go off when in power saving mode.  THEN when you turn the TV and Box back on you get a message on the TV saying That you have saved power  by your box being off for for so many hours. (para phrase)  

You will not get this message when you turn your TV on if the light on the X1 box is already on when you turn the tv on..   Try it   Manually turn off the box when done with the TV  Then turn off the TV.   When you turn the TV and box on after several hours or overnight you will see that message.

Yes I got that message also when the TV and box came on together. I was also told that even if the box goes to sleep at night the recorder still works. So if you have anything programmed to record in the middle of the night it should work sionce its all cloud based, I never did try it.

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@jmg1951 wrote:

Yes I got that message also when the TV and box came on together. I was also told that even if the box goes to sleep at night the recorder still works. So if you have anything programmed to record in the middle of the night it should work sionce its all cloud based, I never did try it.

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Strange now.  After I changed the HDMI Port setting on the TV, like I said previously that fixed the handshake issue, the X1 now never goes to sleep the first few times after changing it would go to sleep “sometimes” now it.  never goes to sleep 

fixed problem on vizo tv by changing update time to when i will be watching tv and turned of cec i tv systems setting works fine now

Didn't realize VIZO was effected with this problem also. Great that you found a work around for the problem. Maybe one of these days Comcast will come up with a pernament fix!

I agree that using the Power Saving setting to "on" is a work around for the box problem that works with all brand TV's. The only problem I see with that is Comcast updates their cable box when the tv is off and the box is on, with the box off you will never get updates in their attemp to fix the problem. I would leavev it on at night  a couple times a week so you get the updates. Comcast called me yesterday and they are sending update # 13 for this problem to my box today to see if it corrects the problem, so far all previous updates have not worked. I've been helping them test the new updates to see if there are any changes.

Did you try what jmg1951 suggested.  That is turning offf the UHD on HDMI connected to the X1 Box.  On my tv I found that in the TV settings   I tried that about a month ago and have not had the problem of Black screen since.  However,  for some reason it created another issue which is that the X1 box never will go into the sleep mode even though I have that setting turned on.   I had comcast out the other day and the Tech said its is not suppose to go to sleep.  Well that is contray what the information says right under where you turn power savings on/off as well as contrary to what I have experienced  Anyway he changed the X1 box.   That night when I turned off the TV, the box light stayed on But later went into power savings mode because when I got up in the morning the X1 box light was off.  And when the TV came on it did say I had saved 6 hours in power savings.   

That was three days ago and since that one time of the new box  going into power savings mode, it no longer is going into power savings, event though power savings is turned on.  

At least I am no longer having the black screen Handshake problem.   

So if you have not tried turning off the UHD to the port give it a try, it solved my issue and there is no difference in the picture quality its sill great 4K.   jmg1951 had said that the UHD setting is not needed for the X1 box which proved to be correct in my case.

UHD is off to all HDMIs . . . so that's not it . . . off that it was ok for a while with power saving on on X1 box