What causes the dashboard light to go out?

Hello, There are two main places to look. The fuse box will have a fuse for the dash lights, but the fuse may also provide power to other accessories. Check the fuse first. Next, the dimmer switch may be faulty, which would replicate your situation as well. Lastly, you may have a wiring issue, which would need diagnosis by a professional, or just a lucky find. I'll leave a link to certified shops in your area here: http://repairpal.com/infiniti-within-10-miles-of-rochester-new-york-14627