Unfortunately there are over a dozen different things that can cause your OTA antenna to stop working. Let’s focus on the more common issues to troubleshoot first. If there is any type of amplifier in your set up, first find the power supply to it and make sure it is plugged in and the outlet is in working order. If it is plugged in make sure the indicator light (if it has one) is lit up. Next, unplug the power supply, plug it back in and then go to your television and run a full digital channel scan. If that does not work, then you need to walk through your existing set-up to check for damaged parts. Check and/or replace damaged or old cables, splitters, transformers, and amplifiers. Also check the antenna to make sure it has no physical damage to it, and that it has not been turned towards a different direction. After you troubleshoot, or make any changes always run a full digital channel scan on your television to see if that fixes your issue.