Interior lights not turning on
 

My interior analog gauge lights are not turning on when I put the headlights on. This includes the tachometer, speedometer, the temp and gas gauge. The digital gauges underneath do get dimmer though. Headlights are working fine and all the lights in the center console work fine.

Is it just a bulb that gave out? Ignition problem? How do I even take out the gauges to replace a bulb?

How to remove instrument cluster: http://boxsters.addr.com/hacks/cluster.htm

Bulbs: http://www.renntech.org/forums/index.php?showtopic=1827&st=0&p=8151&#entry8151

This then cannot be a bulb issue because all the bulbs went out at the same time.
Wiring? The only change I made recently was changing my stereo head unit.