Whirlpool Refrigerator WRX735SDHZ03 top lights all work but 1 bulb and drawer light doesn't but freezer light does. Can I just change a bulb or is more at problems exist and if yes how much is a repair cost

Brand: Whirlpool
Model Number: WRX735SDHZ03
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If one of the LED’s on the LED module is faulty then the entire module would need to be replaced.