1987 Corvette digital cluster

The cluster lights work but none of the gauges do.There is some fading or sunburning, they call it, but I'm told this will not prevent the gauges from working. The speedo,tach,and center,which has oil pressure,temp,and other readouts do not work at all. Please help. Thanks.

P.S. There has been a radio change and I found a brown wire behind the radio that has been cut and is not connected to anything.

There are services on the web that rebuild\repair digital dash clusters. A guy in Bloomington Ind. does this service. His phone # is 1-888-454-1911.
if you search on ebay you will find a guy who sells his service for 149.00 to fix your cluster. Hope this helps