Whirlpool Side by Side S20DRBB32-A/g

Hi hope you can help above freezer nc code 858615815001 failed when fridge door opened ie lights went out and display board blank,
on restart the relay clicks once on power board and display shows all segments lit then temperature for left and right scrolls clockwise then dims and goes off. i think i have a board problem not sure wether power board or display this appliance did have a power board fitted for not defrosting some time ago, ps i don’t normally do refrigeration but its my own appliance appreciate the help thanks jd 😀