I own a Nikon D90. How do I fix my light meter in the viewfinder?

My camera has taken a 2 foot drop onto a carpet floor. The body and lens are just fine, but the meter in the viewfinder isn't working. What can I do to fix this problem? Is it simple?

Added (1). And I can't send it out for repairs, because it could take up to six weeks for a simple fix. I need it done As soon as possible. Suggestions?

Simple as sending it in to Nikon for repairs.