There is the nuclear option of a "reset" - but that will wipe all your recordings and series links etc.
Not much else you can do except do a quick check that all of your coax cable connections are in nice and "finger" tight - at the Hub and wall box and also at any splitters/attenuators/etc. Ensure there are no “unterminated cable loose ends. Disconnect all the connections and reconnect to be sure. Also check that the internal wiring is ok with no kinking or chaffing, check that all looks good with the outside cabling and wall box.
You probably need VM input - so either wait on here for a day or two or try calling it in - 08.00 is the best time for getting through.
-------------------- John --------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.