Trying to improve my 2001 LT by adding an onboard computer. I bought a used unit off E-Bay, cut the hole in the dash, found the connector waiting under the tupperware, and hooked it up. No joy. Cleaned the connector and applied dialectic grease. Still no joy. Now I look at my dash and I no longer have numbers displaying for the gear indicator or clock. The light is shining, just no numbers. I un hooked the computer, still no display on gear indicator or clock. I unhooked the battery for 3 hours hoping this would reset something, but still nothing. Did I fry my display by hooking up a faulty computer? How does one fix this?