I would check the fuse and the dimmer knob. If the fuse is blown, no lights. If the dimmer is turned too much down, then no lights as well. I know my kids love to play with the dimmer in my car so often it's turned down. You may also have burned out light bulbs behind the dash. Start with the basics first(dimmer, fuse) and then check the lights if the basics down turn up anything but you're still getting power to the dash.