I suspect this UV light is nothing but a rumor just like the software fix, magic LCD lotion, and lucky-charmed heater (a.k.a. IR instead of UV radiation). I cannot find a single engineering or scholarly document that shows UV light can remediate subsurface LCD discoloration. Every case of subsurface computer display discoloration that I can find was fixed in one way and one way only, by replacing the defective screen. I wonder what rumor is coming next... nanotech-bots? Ultrasound? X-Rays? Gamma Rays? Neutrinos?