topic EOS 5D Mark IV - Error 20 in EOS DSLR & Mirrorless Cameras

EOS 5D Mark IV - Error 20

WNCphoto — Sun, 26 Jan 2025 16:47:14 GMT

I have a Error 20 message on my EOS Mark IV. I have turned it off an on, tried different lenses and swapped batteries. It has been suggested that I send the camera to Canon for shutter repair. How does this process work?

Re: EOS 5D Mark IV - Error 20

deebatman316 — Sun, 26 Jan 2025 17:25:08 GMT

What lenses are you using Canon or 3rd Party are any battery grips being used external flashes/ speedlites. Does the camera work with the memory cards removed.

Re: EOS 5D Mark IV - Error 20

WNCphoto — Sun, 26 Jan 2025 23:26:59 GMT

Thank you for your response. I use the 24mm-105mm kit lens and the EF 300mm 1:4 L IS lens. No 3rd party equipment, no battery grips or external flashes/speedlites. The camera does not work with or without the memory card.