1996 Pontiac Grand Am Question with dashboard problems

I'm not sure if it is a problem with the computer or if it is an electrical problem or both. But when I start my car and start driving, all the gauges on the dashboard, the speedometer, odometer, engine temperature, and gas level start to flicker and then stop working. I'll be driving and my speedometer will be at 0, gas level at empty, etc. Then at times it will flicker and start to work and then flicker and die again. The car still drives but I do not know how fast I'm going or if there is an actual problem with my car because the dashboard isn't working right. My friends have looked at my car and still don't know what is wrong with it.