Do you know what is wrong with our refrigerator?

Our Frigidaire top-freezer refrigerator is running, light is on, mostly empty-- and WARM. The meat that was in the freezer is thawed and I so I think the refrigerator and freezer have been not cooling for two days. The black tubes on the back are clean, the dials are turned to mid range, but when I turned them all the way up, nothing changed. I will call a repair man on Monday, but wanted to see if anyone had some advice.