I can't see image on my new camera?

I bought NikonD3100 recently. I had a sigma compatible lens to models like Nikon FE2.So now I tried taking picture with it using NikonD3100. I don see any image. So is it possible to do any conversion or adjustment so that I could use my old sigma lens and present camera D3100.

You'll need an external light meter if you want to use non-CPU lenses.

There's probably something wrong with your lens or you just need to go and exchange your camara with a different one

Try taking off the lens cap.