To order LED replacement kit go to https://bigdogelectronics.net/collections/for-techs/products/television-led-backlight-strip-repair-kit-includes-50pcs-3v-1w-350ma-2538-led-s
This is a step by step tutorial on how to break down an Lg tv model 50ln5100, 5400 right down to the led strips. How to find the bad led strip, voltage measurements, and replacing individual bad led's. The problem with this tv is that it turns on, the screen flashes 1 time then there is no backlight, no picture, but the tv still has sound.