1983 Cadillac El Dorado DIGITAL DASH PROBLEMS

I BROUGHT A 1983 CADILLAC ELDORADO BIARRITZ, 8MOS AGO, IT WAS SITTING FOR ABOUT A TOTAL OF 10YRS, BROUGHT A NEW BATTERY FOR CAR AND DROVE IT HOME, THEN I NOTICED THE BATTERY WAS GOING DEAD, CHECK THE ALTERNATOR, AND THAT WAS THE PROBLEM, WHEN I BROUGHT THE CAR THE DIGITAL DASH CUSTER WAS SPINNING IN CIRLCES, A COUPLE OF DAYS LATER, IT WENT COMPLETELY OUT, ALL LIGHTS WORKS AND BLINKERS, CHECK FUSES IN THE INSIDE, PLEASE HELP GET MY CADDY BACK ON THE ROAD.