http://www.nikonchat.com/nikon-coolpix-s230-black/

Nikon Coolpix S230 help?
I have a Nikon Coolpix S230 and sometimes when I take pictures come out with Fuzzys little blurry but not its looks a bit like snow almost ive tried different settings but for some reason (my room is black and blue) when I take a photo with the black wall in the background puts Fuzzys. How I can fix this?
You're seeing "grain" or electronic noise from the CCD camera. This is most noticeable in dark scenes with times Long exposures and high ISO settings. The only way to get rid of it is that it sets the ISO to 400 or less, the use of adequate lighting or use flash. Check a look at the tutorial below and see if your picture looks nothing like one of the three "black" shootings near the bottom. If that is what is seen, is noise.