Backlight acting up on toshiba tv

Backlight acting up on toshiba tv

Okay, I have a Toshiba 5OL1400U tv, and lately it started acting up, the corners of the screen darkening to where it is hard to see the picture. So I look it up, wondering what it could be, and everything points to the backlight, either it is burned out, or something is wrong with the power supply board giving power to the backlight.

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