Backlight-Tester

🧰 DIY Backlight Tester for LED TV Repair

A simple and effective DIY Backlight Tester circuit designed to test LED strips used in TVs, monitors, and backlight panels. This compact tester helps you quickly identify faulty LEDs without disassembling the entire screen — perfect for TV repair, LED maintenance, and electronics enthusiasts.

⚙️ Features

Compact, safe, and easy-to-build circuit

Ideal for TV repair technicians, DIY makers, and electronics students

Works with most LED backlight configurations

🪛 Components Used

Bridge Rectifier 105J / 400V Capacitor - 474J / 400V Capacitor - 470K / 1W Resistor - Phoenix Terminal - KF301 Terminal - 3K Ohm NTC - 271K VDR - 47uF / 400V Capacitor - Fuse Holder - 2A Fuse - Rocker Switch - PCB - Power Cable - Multimeter Probe - Enclosure box

📺 Build Tutorial

You can watch the complete step-by-step video tutorial on YouTube 👇 🎥 Watch Full Build Video

https://www.youtube.com/watch?v=IzfISLdiEfw

⚠️ Safety Note

Although this circuit runs at safe voltage levels, avoid short circuits and do not touch the test probes during operation. Always use insulated connectors and test in a dry environment.

📄 License

This project is released under the MIT License — feel free to use, modify, and share it with proper credit.

💡 Credits

Created by Techonix-DIY Follow for more DIY electronics projects and tutorials: 👉 YouTube: @TechonixDIY