46" Sharp Aquos Blue Haze Problem?

I bought my tv from Best Buy about a month ago, and ever since I had it delivered, there has been a "blue haze" that shows up off and on, and all over sometimes, on my screen. On all inputs too. Sharp sent out the TV Doctor Tech., and he thought that it needed a software upgrade, but one wasn't available. What could cause this blue haze thing? Everything else seems to work fine.