Your TV has sound but the screen is completely black. This usually indicates a backlight system failure. Master Xiao Yijiang shares a simple way to diagnose it: **Flashlight Test:** 1. Turn on the TV and tune to a channel with content. 2. Shine your phone's flashlight directly against the screen. 3. If you see a faint image in the illuminated area, the LCD panel and mainboard are fine; the issue is with the LED light strips. 4. If you see absolutely nothing, the problem may lie with the mainboard or T-con board. **Common Causes of Light Strip Failure:** - Burnt-out LED beads due to aging (most common) - Faulty constant current driver board - Poor connection in light strip cables **Repair Options:** - **Replace the full set of LED strips:** Recommended for longer lifespan. - **Replace individual damaged LEDs:** Lower cost, but risks damaging adjacent LEDs again. The Xiao Yijiang TV repair team keeps stock of light strips for all brands and sizes. We fix it today so you can watch today. Transparent pricing starts at a base rate. Call 400-1060-908 for a quote.
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