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[tidy]

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[Despoiler]

I have an otherwise flawless U2711 that has an intermittent brightening/glow in one corner. It looks like regular clouding, but it is not there all the time. It has nothing to do with IPS glow.

Q: What are the symptoms of a failed CCFL backlight?

A: If your display is simply not illuminating and it has not been subject to damage such as dropping it, is very likely that your CCFL is to blame. Typical symptoms of an aging or failed lamp include flickering, low light output, pinkish hue to the screen, momentary flash on at start up and then out or simply inconsistency, on and off of LCD display.

 

[Rifter]

IMO a failing CCFL looks like exactly what you are describing.