On this page, you will find more information about the most common causes and most relevant solutions for the Camera error 'Err 40'. Do you need help straight away? Visit our support page.
The Canon documentation indicates that error code 'Err 40' is caused by the following problem: "A power malfunction has been detected".
Do you think there is another cause for this error? Let others know in the comments.
We've created a list of solutions which you can follow if you want to solve this Camera problem yourself. Do you need more help? Visit our support page if you need professional support with Camera right away.