1991 Chevy Blazer Digital Dash

Electrical problem
1991 Chevy Blazer Four Wheel Drive Automatic

My dash lights, instrument panel is digital and will not light up. I can't see any of the gauges[gas, speed, oil, etc], cig lighter doesn't work ither. The radio does work. I have checked and even replaced some fuses and they are fine. What could be wrong, Im looking for a solution because this problem is driving me nuts!