My sub zero 690 has the fridge & freezer light out as well as the screen
Well the most likely cause is 2 bad door switches, though I rarely see the door switch go bad in the freezer. At the top of the door openings you will see 2 switches in the freezer and the fridge. If you pull down the grille and remove the cover over those switches, the light switch will be the one with the white back, and the fan switch will be the one with the black back. I would try changing the switch in the fridge, and maybe start in the freezer by changing at least 1 bulb before blaming the switch. If that 1 new bulb doesn't light, change that switch too.
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