How to Troubleshoot When a Light Doesn't Work Correctly

By far, one of the worst things that can happen when you’re working with stage lighting is this: your lights just don’t work right. Maybe they’re not doing what you told them to do. Maybe they’re showing the wrong color, or worse—not responding at all. So, how do you fix it? Where do you start? And what’s the most reliable way to get them working again?