Chosen Solution

when i press the shutter button camera says “error . press shutter releace button again”

  • First, Remove Its Battery. Remove the Bottom Base Cover PlateRemoved All Screw Holding the Base CoverProceed Removing All Screws in a Sysmetic Clockwise OrderRemove All Screws and Aside It on a Piece of Tissue PaperView of the D40 DSLR Base With Cover Removed.The Gear Operating the ShutterLightly Move the Gear & Inspect for ContaminationA Closer View of the Gear Seen Through a Magnifying GlassRepeat About 5 Cycles.Apply New Grease Between Gears
  • Spray a Little at a Time & Move Th Gears Move the Gears 5 Cycles to Spread Out Grease
  • Insert Battery & Test Before Closing Up Cover. Close Back Base Cover & Have Fun! If you want to watch all these instruction with images then open Nikon D40 Manual.