Insignia 55 inch, has sound but no Picture. NS-55D421NA16 TV repair.

This is a 55" LED Television made by Insignia. The model on this flat screen TV is ns-55d421na16. When we power the television ON, there is absolutely no picture, just a black screen. Through our troubleshooting methods we determine that we have a backlight problem. In this video I am going to show you how to disassemble the television to get to the actual led strips. Then we are going to find the bad led strip and then replace the individual bad led on the strip.
FOR TOOLS AND TEST EQUIPMENT
bigdogelectron...