norcold fridge, no display - blown fuse?

I pulled the cover off the circuit board in the compartment behind the fridge, and found the 2, 5-volt fuses. Both check out OK with an ohm meter. I think that's as far as I'm going to go with trying to fix this myself, made an appointment with the repair shop. I did buy the extended warranty, so it should be covered. I still don't know what that small add-on circuit board with the red led is all about. Someone mentioned a recall. Would that ckt board be associated with a recall that happened before I bought this rig about a year ago? I'll also ask the guys in the shop what they know about it.
Thanks again everyone. I hope to see you down the road one of these fine days.
Later,
Dave