I have two values that need to be open for the stove to work. One is under the top cover. If you pick it up the burner crates fall off
and there is a value on the right that controlls burners and oven gas. The other one is under my trailer on the same side. I don't know if this is standard or not but I suspect all have an outside shut off for safety. It takes awhile for the line to clear of air. Don't forget to check all connections for leaks . There may be a reason it's been turned off outside
. One of those gas detectors is IMO a must have item.