None of my cable outlets will connect

No error codes. We setup the menu on the contour, but when we tried to watch a show, the screen would go black and nothing would come on. It would also tell us to try a different show. We aren’t using a splitter, but I couldn’t get the old cable to disconnect from the outlet to try the new one. It’s frozen from age. We will most likely need a technician, but we just started having a bunch of electrical problems the same night after we tried to hook everything up, so we will need to get that sorted and fixed before we can have a technician out. The modem did connect to one outlet, but it’s all the way at the other end of the house and the signal doesn’t reach where we need it to.