<p>Hope someone can help:<br /> I have a Nikon D3100 with a 18-55mm lens purchased new in Dec '13. It has seen light usage and has not experienced any damage. Recently, I noticed the camera having difficulty or slow response with focusing on objects. I attributed this to a nearly full memory card and replaced it with a brand new one to no avail. More recently, the camera not only had difficulty focusing but would fail or delay to shoot. The camera then would only shoot in very limited modes (i.e. 'sport' mode) but no other. As of today, the camera will not shoot in any mode nor will it focus. I believe it is safe to assume the two are related (bad circuit board perhaps?). I have attempted to shoot in all modes and with the lens in both "A" and "M" settings and with "VR" both selected and de-selected. When I depress and release the shutter release, I can hear the camera make slow 'clicking' sounds, as if it is attempting some physical task. I have thus far: 1) Assured the battery is fully charged, 2) replaced the memory card with a brand new one (which is matched to the manufacturers specs), 3) Attempted to shoot in all lighting conditions, both indoor and outdoor, 4) Selected 'reset shooting options' in the menu, 5) Assured I am only using the viewfinder to look through, 6) Removed and re-installed the lens twice. Any thoughts/suggestions would be most appreciated.</p>
