Not able to get ABC CBS NBC or even low channel 165 LOGO ON X1 box

[km20]

Hi there. Have never had this problem before and called comcast . have sent refresh signal and rebooted box several times.  Has a code but can't remember it.  Message says " We're having a problem on our end. Please try channel in a few minutes."  Its been 2 days. Have a tech schduled for tomorrow.    Same channels don't even work on a plain digital adapter box.  Those same channels say the signal has been interupted.   ANy ideas??  I am in Naples FL.

[CCAndrew]

You can check all of your connections, etc. But it sounds like something is happening to impede the frequencies of those channels. You’ll probably have to wait for the tech visit