Nikon d5000 manual mode

When i put my camera in manual mode (M) and i don't use the flash, my pictures come out pure black with nothing. I was using it indoor with a lot of light and it was still black. I changed the ISO and it made minimal difference. Does anyone know what i could do? Also i don't want links to other websites unless they answer my question!

If your picture is completely black, that usually means you are using a tiny aperture with a super fast shutter speed.

look at what your light meter says. If its in the negative, that means it is going to be dark. Try to get it near the center for a "correct" exposure