After pushing Flash Focus button, the color layer convergence is fine in the center, but BAD in the top left corner.

After pushing Flash Focus button, the color layer convergence is fine in the center. However, the red and green color are bowed toward the center in the top left corner, and can not be fixed by pushing Flash Focus button. When powering up, noticed that the power indicator light flashed seven times. Wonder what could be the problem? and how much it might cost to repair the problem? Is it very hard to do it myself?

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