Blue backlight on our Smart Oven BOV800XL went out and won't come back..

The blue LCD backlight on our BOV800XL has gone out and won't come back on, even when we push the Start/Cancel button or turn any of the dial. Digits still appear, just not the blue backlight. I also unplugged the unit for 10 minutes and plugged it back in, but that didn't work either. Help!
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