Dashboard lights are not lighting up

I have been trying to diagnose this issue. My dashboard (speedometer, gauges etc). Do not light up. I have replaced the fuse three times. I even tried cleaning the actual fuse socket. It will work temporarily but it just is not staying lit. When I put in a new fuse, I actually feel and hear the volts moving thru the fuse. It will work temporarily and then the next time I start the car it will not light up. I am completely stumped. Please advise. Thanks.