How much will it cost to repair my Philips Flat screen plasma 42" TV to get rid of 3 inch vertical stripes?

I have 2 vertical stripes, each 3 inches wide running from top to bottom on the screen. They are there over the PS3 games, DVDs, and ATT U-verse menus. Philips says it's probably the video board. What is a reasonable quote to fix this and should I just get a new TV instead?
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