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Thank you for your question.
What is the LG model number?
Has the blue tint been there since it was new?
Please verify that the tint/hue is in the center of its range. Also, which input are you using and does it effect the Menu color?
Please verify the Color Temperature setting, and set it for less blue.
OK, be sure all the component cables are firmly inserted. Losing the red will cause a predominately blueish green picture. however if you are just trying to compensate for a slight blue overall tint the the Color Temperature should be tried.
Warm will make the blue tint less...
Cool will make it blueish...
The center range for the Color Temp is Medium but you can select Warm if it helps the blue background.
The Tint/Hue should be the one that is set in the middle of its range.
Are you getting any red at all?
OK, please try a different input to see if the blue condition changes.
Is there a cable box on Component #1?
Please re seat the component cables at the cable box and re power the box.
At this time the Component input, Component Cables, and or Box could be causing the issue.
You could try an alternate Component input on the TV to help isolate the issue.
Please hit the ACCEPT button when you are ready.