https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-5D-Mark-IV/m-p/377728#M88918 <P>Looks like problem solved. Just updated the firmware from 1.3.1 to 1.3.3 and the click sound stopped. Hope this helps if anyone else has this problem. Might be a place to start..</P> Thu, 30 Jun 2022 17:57:25 GMT MrJ1 2022-06-30T17:57:25Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-5D-Mark-IV/m-p/377716#M88915 <P>Have noticed a click sound when turning on the 5D Mark IV camera. This is the only time this sound occurs. Have turned off sound &amp; sensor cleaning but still get click sound when turning on camera. My 7D Mark II does not have this click when turning on camera. It seems like it just started or I haven't ever noticed it before. does anyone know what this is or is this normal for the 5D?</P><P>Thank you for any help.</P><P>&nbsp;</P> Thu, 30 Jun 2022 17:20:46 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-5D-Mark-IV/m-p/377716#M88915 MrJ1 2022-06-30T17:20:46Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-5D-Mark-IV/m-p/377728#M88918 <P>Looks like problem solved. Just updated the firmware from 1.3.1 to 1.3.3 and the click sound stopped. Hope this helps if anyone else has this problem. Might be a place to start..</P> Thu, 30 Jun 2022 17:57:25 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-5D-Mark-IV/m-p/377728#M88918 MrJ1 2022-06-30T17:57:25Z