This sharp LC 50LB371C tv would turn on but had a black screen. It turned out to be the back lights. links below to led's, Suction cups and much more! To do this repair 1. Take off the back assembly 2. Take off the front screen assembly 3. Tape the ribbon cable from the LCD to the back of the LCD panel 4. Use suction cups to remove LCD panel 5. Test all LED strips, find the bad ones 6. Re-install them and double check that they are all working 7. Re-glue the led covers 8. Re-assemble the TV. Essential Tools -Two suctions cups (https://amzn.to/2KF84r7) -Led tester (https://amzn.to/38lRq89) -Tweezers (https://amzn.to/2WpWEdg) -Screw drivers (https://amzn.to/2LTftUp) -Wire cutters (https://amzn.to/37wNJx9) -Soldering iron and Solder (https://amzn.to/38gXFdg) -New leds 3V (http://ebay.us/hMMfCQ) or https://ebay.us/txZ4hE Recommended tools Heat gun and solder paste (https://amzn.to/3p3kGXS) (https://amzn.to/38iKE2F) ICE cube tray for screws (https://amzn.to/37wMwWB) Electric Drill (https://amzn.to/34m36GH) Tips and tricks You can do a backlight repair without a heat gun just watch my video. • Simple Backlight Repair (under $20) Please subscribe to my channel