Product Description for LED Lamp Bead and TV Backlight Tester Unlock the potential of your electronic repair skills with our advanced LED Lamp Bead and TV Backlight Tester. This indispensable tool offers precision, safety, and convenience for effectively diagnosing and troubleshooting LED lighting issues across various devices. Integrated Microcomputer Technology: Our tester features a high-speed single-chip microcomputer for precise voltage sampling tests, directly driving the LED lamp to display voltage. Unlike competitors that use separate voltmeter heads, our integrated board card design reduces the defective rate and ensures constant current flow for reliable results. Wide Voltage Adaptability: Capable of adapting to a 0-300V range, this tester is suitable for most series and parallel lamp bead tests. It adopts a gradual startup mode, automatically adjusting voltage and increasing current gently to prevent burning out lamp beads. Achieve normal brightness in just three to five seconds, even with reversed polarity connections. Accurate Digital Display: Featuring a digital display of real-time voltage output with adjustable settings for self-calibration, the tester uses a green light-emitting tube to indicate "00" for short circuits and "300V" for open circuits. This ensures consistent voltage display for each LED light bar group in an LCD TV, facilitating efficient diagnostics. Safe and Portable: Designed with cold and hot isolation to prevent electric shock, this tester is both safe and user-friendly. The integrated design of the power cord and machine box enhances portability, making it convenient for on-the-go testing and repairs. Efficient Screen Testing: Illuminate LCD TV screens without the need for disassembly. This tester can even light up screens with faulty lamp beads, allowing you to identify voltage discrepancies among parallel groups and pinpoint damaged LED lamp beads quickly and accurately. Enhance your toolkit with our LED Lamp Bead and TV Backlight Tester, offering cutting-edge technology, robust safety features, and intuitive operation. This essential device is perfect for professionals and DIY enthusiasts, ensuring precise and efficient LED testing and repairs with every use.