eos40d. Poweroff when shutter is released

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pentaprison

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A friend of mine has a Canon EOS40D. Over the last few weeks it has started to develop a fault. When the shutter is released the camera powers off, leaving the shutter open. If he then removes and replaces the battery the shutter closes again on power on.

To me, it sounds like a real fault, and will need to be returned for repair. But just in case anyone knows any different I thought I'd post here.

(BTW. He has tried several, fully charged batteries, so we think he has eliminated a worn out battery as the cause of the problem.)
 
has he set a sensor cleaning mode?. I'm not sure about the cannons but newer Nikons have a lock mirror up for cleaning mode that behaves excalty like this. Ask him to check this
 
boyfalldown said:
has he set a sensor cleaning mode?. I'm not sure about the cannons but newer Nikons have a lock mirror up for cleaning mode that behaves excalty like this. Ask him to check this
Click to expand...

Thanks. He's going to check when he gets home.
 
The sensor cleaning mode on my 450d doesn't work like that. In fact, it's recommended to ensure you use a fully charged battery as it uses power to hold all the components open and out of the way of the sensor. The sensor clean mode is operated from the menu also, rather than the shutter button.
 
Yes but there is a mirror lock function for reducing mirror shake, it could be stuck in this mode.
 
Thanks for the replies folks. He's tried the suggestions but there's no improvement. :( So he's returning it to Canon for a repair estimate.
 
I thought I'd provide a final update on this as I know it is very frustrating for anyone finding this thread to not know the eventual outcome.

My friend contacted Canon UK and asked for a list of approved service centres.

The first place he contacted from the list offered to service the camera for £140, which would include any minor repairs, but if there was anything major he would need to pay more on top of that. This seemed like a pretty poor deal, so he checked the list again and noticed that the last entry on the list was the Canon UK service centre in Borehamwood.

So he contacted them, and they explained that they would assess the cost of the repair for free, and provide him with a quote which he could either take-up, or just pay the postage for the camera to be returned. This seemed like a much more reasonable deal, so he sent the camera off and was quoted £153 for the repair.

He gave the go ahead for the repair, but was a little annoyed because although the camera is 2.5 years old he hasn't used it that much.

We then got talking about shutter count, and how to read it from the 40D. Of course canon had the camera by now so he rang again to ask them to tell him the shutter count on the camera.

This was definitely a good move because the shutter count was only 8400. Because of this low shutter count, Canon made the repair for free as a goodwill gesture. :) (without even being asked - which seems to me to be exceptionally good service :thumbs:)
 
That's good news for your friend and Canon owners.

Maybe Canon UK had read all the bad press about themselves recently through this forum - :naughty:
 
Battery issues?? My 400D did just that when the battery was dead - the camera would still read a half battery full when it had effectively died. This is a fault with the Canon's firmware... It would lock up with the shutter open with all the lights on meaning you had to release the battery to reset it. If its this, its not a big problem.

Has he tried a fresh / recharged battery?
 
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