There are still plenty of analog strobe light systems installed, some intermittent and others completely inoperative. While limited troubleshooting effort might be in order to determine if a fix is simple, we think you should use caution with old systems because the money might be better spent on either a drop-in replacement (we covered them in a roundup in the March 2024 Aviation Consumer) or a new install. For that, we think the uAvionix skySensor is a smart choice, and it’s one that doesn’t get enough consideration because many shops might not suggest it.
First, here’s a brief overview of what can go wrong with old systems with external power supplies.