LG side by side fridge, GR-L207EQ. There is a light in the freezer compartment but no light on the fridge side. Function display board on the freezer door has no lights on.

SOURCE: The water filter keeps freezing and food in door and on shelves keeps freezing.

clean lint from coils in back. could also be low on refrigerant (freon)

SOURCE: No light in fridge compartment, Not freezing. Light in freezer co

Your door switch is bad.  When doors are opened, the fan stops.  No cooling.  When it closes, fan starts.  Bulb is just an indicator of no power to unit...probably burned out contact in switch.

SOURCE: LG GR-349R bottom mount freezer gets heavy ice

Find the drain tube in the back and check it for a frozen state. If it si,use a hair dryer to thaw it. If it does it again, you have a defrost problem

SOURCE: brandt apollo fridge/freezer - food defrosts + salad freezes

Check the vents in the fridge side and close a little if you can. On the freezer side just for good measure>>>>
Is your circulating fan working?
Sometimes they stick and need a shot of WD 40 and then work
it back and forth a little until it wants to take off again. Keep me informed
and PLEASE give a Thumbs Up for the effort. The Raz Shack

SOURCE: LG express cool no frost

Just defrost the fridge. Once defrosted, the food compartment below the freezer should cool.