The Canon EOS 7D was Canon's first high end professional camera with an APS-C crop sensor.

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ERR MESSAGE 40 Power Source Malfunction

I was shooting a birthday party the other night and the camera just stopped working. I first noticed the battery gage level was going up then all the way down. I looked up ERR 40 and it said on a site it's a power source malfunction. Is there any way I can fix it or does it need to be returned?

Thanks.

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Hi!

Here's some basic troubleshooting information from Canon:

""Err 40" indicates that a malfuction related to the power source has been detected. Please follow these steps to attempt to resolve the error:

- Power down the camera.

- Remove the lens, battery and memory card.

- Let the camera sit for 10 minutes.

- Use a soft microfiber cloth to clean the contacts on the battery and inside the battery compartment.

- Reinstall the battery.

- Power the camera on."

If that doesn't work it might be more serious component issue.

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