I have never seen a circuit board from one of these racks, but it would definately be worth a go.
Unplugging and reseating the connectors might just be enough, especially with the road salts and such in the north.
Had a buddy that bought a chevy astro van that the trans shifted horribly on, fluid was full and not burnt at all. Connector on the trans was all gunked up with grease and schmoo. Buddy cleaned the connectors, and the transmission shifted like new again.
My kid bought a late 90's Neon that had an intermittent and then dead instrument cluster. When I removed the circuit board from the assembly, I noticed that at least half of the solder connections for the wiring harness plugs were cold solder joints.
Cleaned them up and resoldered them, and the cluster was as good as new.
You never know.