I had the same exact problem last year with my new 2017 175BH. OTA signals were great, but cable and satellite were a no-go. Turns out the outside connector was bad. Took the mounting plate off, popped out the coupler, replaced it with one that was a known good one, and now all is well. Troubleshooting cable issues can be a pain when the issue is a small one like mine was. Good luck.
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