Error RDK-03033 Unable to change channel on X1 boxes

Is there a bug with pictures?  I inserted photos and they did not show up in my last post.

Image of pinched cable 

Another image of pinched cable 

Hi, thank you for the advice...BUT so far I have not been able to meet up with a Comcast tech at home.  I called the customer support a few times, and they have scheduled a tech to come out last wednesday from 10-12, but it was a no show, I had to go back to work, and at 1:30pm a tech called me saying he was on his way, but they told me 10-12.  I waited during that window.  I understand things happen, but it didn't work out.  So this weekend I decided to at least try and make sure all connections, inside and outside are tight and secured and there isn't any nicks or damages to the line made by lawn equipment or whatever.

I started the trace inside.  Removed and reconnected all connections at the TVs and boxes.  No difference.

I then moved into the attic, as I know I have two splitters up there.  Many years ago (probably 6, 7 years ago) when they put in the original coax line, I used one 1->2 splitter to split the in coming line into one for the modem, and one for the TVs.  Then the TV line is further split into three individual lines for the three TVs (two X1 boxes and 1 transport adapter).  I check those connections.  They are tight.

But one test I did do, is since I have no issue whatsoever with the internet service, I disconnected the line to the modem, and put that on the TV, and vice versa.  that should get the TV a better signal, and vice versa.  I switched the lines around a bunch just to see if there is a difference, NONE.  So I don't think it has anything to do with the lines after the splitters.  I then traced the coax line to the outside.  There I see a comcast box which I do not have a key for, so I cannot see inside.

But there is an orange color line that comes out of it that is buried in my yard, very shallow.  I pulled up the line and looked closed to make sure it was not damaged accidentally by a lawn mower or shovel.  Looks good.  I traced it all the way outside to the back alley where this orange line goes into a green comcast box.  This box.  I opened the lid.

Now I can see where my line is plugged in.  In fact there are many other lines but none plugged in so I guess none of my neighbors are using Comcast?

The line from my house that is plugged in has a pinch where it joins the connector.  I circled in yellow where the pinch is.

It looks like this pinch is right on the underside of the green cover.  A car hit that box or something bumped into it?  Don't know.  But this may be the problem?

So in order to verify this is indeed my line, I disconnected the line there.  Went inside and checked my TV and internet - GONE.  So this is my line.

Plugged it back in, and service came back.  Now I tried to bend it, twist it strained it one way or another at the pinch, and it seems to make a difference.  In fact, at one point, I was able to restart the TV boxes and get completed and connected messages instead of the "issues detected" that I have been getting for over a week.

Is it reasonable to assume this is the source of my issue?  Will cutting the line and replacing the connector be the solution?

I then called Comcast and said I found the issue can you please just send someone out to replace the connector and there is no need for me to take time off work come whenever you can...they said no, someone must be home, we need to schedule it.  Oh well.  I said forget it, I will just replace the connector myself.

Can I just use a standard coax connector and connect it myself?  I can do it in 3 minutes instead of waiting 2 hours+ for comcast  and may be no show.

ah ok, in the forth post, I included links to two pictures showing the pinched cable.  I have a bunch more in the third post but I guess have to wait for approval.