Set top box problem with HDMI

[silverado4x4]

Just starting having this problem when I turn on the TV I will not have a picture sometimes I will have sound and if I unplug the hdmi from the set top box and plug back in everything will be ok if I turn the box and tv off again I have to do the process all over again. The box is a 7100-2 I have hdmi from box to soundbar then to tv, this problem just started a couple of days ago and it has been hooked up like this for a long time with no problems ,Verizon is no help as they did reboots which I have done and I also replaced the hdmi cables.          I did change out the to the other box that has the time display on the front and that works it's just the boxes that don't have the time display. 

[TomH121]

Have you seen this ?

https://www.verizon.com/ForYourHome/VzRepair/VzIHA/Servicecad.aspx?ihaweb=FIX_STBREMOTE

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[CRobGauth]

Don't think that is the problem.

Don't remember the techincal terms, but I seem to remember people complaining about an issue like this.

It has to do with HDMI handshake.

[silverado4x4]

Well just an update the other box with the time display on the front that was working  is doing the same thing as the other boxes and I know it was something verizon did because I have never had this problem before so I'll be on the phone again Friday and if they can't fix it I'll be jumping ship back to directv after being a customer for more then 10 years.