The check light is USUALLY associated with the gas burner not lighting during gas operation.
Is the "AC" light lit on the front of the fridge? If not, is the refrigerator plugged into AC power inside the outside lower refrigerator access panel?
Are the gas tanks turned on, and can you light a gas flame at the cooktop?
If none of these work, since the refrigerator logic circuit board works on 12 volt DC power (the indicator and inside refrigerator lights are usual indicators that you HAVE AC power), you might want to reset/reboot the logic board by disconnecting it's 12 volt DC power by either temporarily pulling its fuse on the 12 volt fusepanel, or disconnecting ALL 12 volt DC power in the rig temporarily by unplugging AC shorepower (to disable the converter/charger) and at the same time disconnecting and reconnecting the main +12 volt wires/cables at the battery.
I hope this helps