@carbonosilicio: My original D19 was 6.2 V.

I've been a long time lurker in this forum and I'm grateful to find such an admirable community of skilled technicians, engineers, and hobbyists.

I have a 20 years old Dell 2405FPW monitor that decided to stop working recently. I'm posting today a partial circuit that helped me to diagnose the faulty monitor, with the hope it can be useful to others. The symptoms first experienced were a flickering image accompanied with muted clicking noises from the back of the monitor. This happened every so often, and it degraded to a complete...