https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-1dx-back-screen-gets-black-when-flash-is-plugged/m-p/375446#M88297 <P>Hey,</P><P>I recently got a 1dx (mark 1), when I plugged a flash the back screen gets black and no button responds. I'm just able to change aperture and shutter speed (even not iso), and make picture.</P><P>Once I turn the flash off, the camera gets fully functional (sometime I have to restart it), and I can see the picture I just made.</P><P>I tried with a old 580ex and a 580exii, same experience. With my 5dm2 I never had such issue.</P><P>Do you guys have any idea about what's wrong ?</P><P>Thanks.</P> Tue, 07 Jun 2022 04:36:41 GMT hafoto 2022-06-07T04:36:41Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-1dx-back-screen-gets-black-when-flash-is-plugged/m-p/375446#M88297 <P>Hey,</P><P>I recently got a 1dx (mark 1), when I plugged a flash the back screen gets black and no button responds. I'm just able to change aperture and shutter speed (even not iso), and make picture.</P><P>Once I turn the flash off, the camera gets fully functional (sometime I have to restart it), and I can see the picture I just made.</P><P>I tried with a old 580ex and a 580exii, same experience. With my 5dm2 I never had such issue.</P><P>Do you guys have any idea about what's wrong ?</P><P>Thanks.</P> Tue, 07 Jun 2022 04:36:41 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-1dx-back-screen-gets-black-when-flash-is-plugged/m-p/375446#M88297 hafoto 2022-06-07T04:36:41Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-1dx-back-screen-gets-black-when-flash-is-plugged/m-p/375478#M88304 <P>I figured out, the M-fn button was stuck inside.<BR />After pulling it out I've been able to use the flash.</P> Tue, 07 Jun 2022 12:12:01 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-1dx-back-screen-gets-black-when-flash-is-plugged/m-p/375478#M88304 hafoto 2022-06-07T12:12:01Z