Question about Canon EOS 40D Digital Camera

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Mirror Lock-up? Tried to clean my 40d, took the mirror up, swtched off, and back on, but can't get the mirror back down .Any ideas?

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  • cos100 Feb 04, 2009

    Thank you for your help, I appreciate it. I have done what you suggested, but it had to go in for repair. It was with Canon for exactly a fortnight and is now back and fully working. Technician said they normally manage to get it working again on line, but not in my case.

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Try to take a photo. if the mirror don't back down, switch off one more time. If the problem is still there you will have to put your camera to repair

Posted on Feb 04, 2009

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A few suggestions: The mirror lock up function has been activated. The sensor cleaning mode has been activated, doing this the camera as soon as you trip the shutter the mirror will come up and all other functions of the camera are inoperable. the mirror will stay in that position until it runs out of battery or you turn it off. The part you said about having to removing the battery doesn't make scents for this function though. Sensor cleaning is in the Custom Functions.
I know you said regardless of lenses and batteries how long do you wait before shutting the camera off and removing the battery? I know that's a question and we aren't suppose to answer a question with a question but the reason I'm asking is that the Canon 40D has a long 30 second shutter speed and a "bulb" setting. It is possible that the camera has been set to "AV" and the shutter is timing out, OR it's been turned to BULB and that mirror will stay there until the camera battery is dead before it drops. Couple things to check out before the next thing I'd think about is the amount of shutter actuation. The Canon 40D has a shutter good for 100,000 clicks/actuation. Sounds like a lot but if you are doing time laps or extended video it's very possible to blow the shutter out of these.

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I had the same problem with my 1 month old 40D! My temporary solution (though I already got a replacement) was to set the camera to P mode, and go to the Sensor Cleaning mode.. Choose Manual Mode, and clean now... Err99 will appear. You have to switch off the camera and TAKE OFF the baterry for few seconds. Once reinstalled, you can hear the click of the mirror resetting itself. You should be able to snap foto as normal for now.. I guessed its one of those mirror lock up that brought up this ERR99 **** thing! It annoys me to do this everytime I use my camera... especially after few days didn't use it..

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