I have a D3100 and the view finder mirror broke. I just don't know how!! It's in warranty but can I get a replacement?... My father doesn't know yet.. guys please reply fast
Your D3100 will need to be serviced by a trained technician. Whatever caused the mirror to break could have damaged other sensitive components as well. Besides, Nikon no longer sells most parts for their DSLRs except to Nikon Factory authorized repair centers.