On-site material repair Samsung LCD TV UA32F4088AR change lamp - android - Phones Developers

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I encountered an issue with a Samsung LCD TV model UA32F4088AR, where the screen had no picture and no display. After powering on the device, I checked the LED constant current board and found that it was providing 135V, but the screen still didn't light up. Upon further inspection, I realized that the LED strips were connected in series, so if even one LED was damaged, the entire strip would fail. I disassembled the screen and tested each power supply individually. I discovered that one of the light bars wasn’t lighting up, and upon closer examination, one specific LED on the edge was not working. This led me to conclude that this particular LED was the source of the fault. The TV uses 5 light bars, each containing 9 LEDs, totaling 45 LEDs. The total voltage is 135V, meaning each LED receives approximately 3V. At first, I considered using LED strips intended for computer case decoration, as they typically operate at 12V and also have 3V per LED. I replaced the faulty section with a normal LED strip, and while the brightness remained mostly consistent, I couldn't adjust the color or intensity of the light-changing part.