I want to wire in a computer and connect to Comcast by an RCA cable modem about 80 feet from the modem, but don't get a signal. I have checked all the wires in my Cat5 cable for continuity and shorts. I have removed and reapplied the RJ45 connects several times, and the wires are installed in the correct order. The cat5 cable doesn't run by any fluorescent lights or electric wires that were carrying current when I tried to connect. Is this distance 80 feet too far between the modem and the computer? If not, what could possibly be the problem? Better yet, what is the solution?
I really don't want to go to a wireless modem for a desktop computer.