This is how the tv looks like before Repair

Lg 55UK6200PVA 55UK6300PVB BLUE SCREEN REPAIR

Cause:

This model have problems with backlight. The LED naturally produce blue light as there is no white LED available to produce white light.

The manufacturer has to coat the led with yellow coating to produce white light. This coat tends to heat up and burn  leaving blue light exposure.

The backlight becomes blue then the whole screen will be blue.

Solution:

We have to replace all of the LED stripes with brand new ones.

Below is the picture of Backlight LED to be replaced and the new ones.

Disassemble

This is how the Backlight should look like after Replacement

Result:

Tv is now working and all colors are back as normal