More than likely you have a burned out bulb. The bulb is not too difficult to replace, maybe an hour or so. The bulb is somewhat special so get it from the Volvo dealer to avoid the rage that goes along with tearing apart your car to find that the autopart store gave you the worng bulb! (experience here, it bites!) For detailed instructions on how to replace the bulb, go to www.volvospeed.com and navigate to the maintenance section. Look under the dash light replacement. Great site, many pictures to help along the way. BTW, do all of the bulbs at the same time as they will be burning out soon anyhow.

Good luck

Prospero