i'm on the comcast of union,nj line. i have 2 channels 840 and 873 that every once in awhile go black for just a second or two.i checked the diagnostics for both channels and everything is fine snr,upstream,etc.then i saw that both channels are on the same frequency 375MHz.comments on anything i could do,i have tried all the usual stuff.i had this same thing happen around a year ago,and it just went away by itself.i know it's not on my end.
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