Bad Coax Cable from Roof Antenna - Help

Most good Coax cable is guaranteed for 10 years and without trauma will easily last 25 years. If it is the cable itself it will likely fail due to trauma, usually where there is movement ie where the antenna goes up/down. I would inspect it carefully on the roof, particularly near the base of the antenna. If the shielding appears to be intact, I would focus on the ends instead. It is easy to crimp on new ends. Compression is much better (as previously stated) but the ends and the compression tools are expensive. You can get a cheap stripper, crimper and box of crimp ends at Home Depot for very little money to do a quick fix. But if you know someone in telecom offer them a few beers to put new ends on with a compression tool.