5D Mark IV - Error 40 when switching on off

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DakiT New Member • Posts: 1
5D Mark IV - Error 40 when switching on off

Hi,

I have a Canon 5D Mark IV which is a month old and since yesterday an "error 40" pops up every time I switched the camera on or off. After about 5 - 7 seconds the error disappears and then I can I use the camera again.

On the LCD Display the camera notifies me to switch off and reinsert the battery . Tried it. Does not work. Changed batteries and does not work.

However I found a temporary fix by going through the camera settings and switching off " Automatic Sensor Cleaning when switching On and Off". If sensor cleaning is switched off the error does not come.

Any Suggestions.

Thanks

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