Question about Canon EOS 40D Digital Camera

1 Answer

Canon EOS 40D shoots on its own.

When I start up the camera it will start shooting pictures rapid fire until I touch the shutter. Once I tap the shutter this stops, however, the focus won't work as everytime you tap the shutter the camera fires another picture. While it is doing this the number of pictures still on the memory card is flashing. The menu isn't avaliable during this either. If I change the shooting mode the menu is avaliable until I tap the shutter again. Then nothing will functhing appropriately.

Every now and then it will go into a mode where it won't shoot a picture. Even if you put your lens in manual mode it won't shoot a picture.

I have tried to change batteries, memory cards, and lenses with no luck.

Posted by on

  • GREG5656 Nov 05, 2008

    My camera was out of warranty by one month. I called Canon and they agreed to fix it under warranty for me. The tech support seemed to think it is the sensor under the shutter. I haven't heard anything back from Canon yet. I know they recieved my camera on Monday, November 3rd. Thank you for taking the time to respond.



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

Sounds like a software issue, try to upgrade or reload the firmware.

I hope it helps :)

Posted on Nov 05, 2008

  • waltk979 Nov 11, 2010

    I am currently experiencing a very similar problem. The camera isn't FIRING continually by itself, but rather is constantly acquiring focus (as if I were partially-depressing the shutter release over and over again). Because of this, I am unable to access the LCD playback or any form of menu EVER--hense, software/firmware updates are out for me (sounds like you can actually access the menus at sometimes, am I right Greg?).

    I've sent it off to Canon for repair$, sadly. The cost will be the usual $200 Canon minimum, of course. I hope it stays near that total :)



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to an Expert (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Canon 40d will not take pictures

1) CF card in camera? Won't shoot without one

2) Does mirror go up?

3) Canon had a run of bad motors for this model - if mirror does not go up, then it is the mirror motor. If mirror goes up, shutter will not fire, press release again then the mirror goes down, the shutter motor is bad (same model motor). If mirror goes up, shutter fires, both blades travel together/no exposure, probably the shutter is bad.

May 07, 2012 | Canon EOS Digital Rebel XS / 1000D IS...

1 Answer

Shoot 5 pictures and get error 99

There are over 40 different malfunctions that can cause an error 99 on a Canon 40D. The 2 that account for over 95% of the error 99's are either a bad shutter mechanism or a bad mirror driving motor. It takes special diagnostic software to determine the exact cause. Otherwise, a repairer just has to start replacing parts until the problem goes away.
Bob Kilbourn

Oct 22, 2011 | Canon EOS 40D Digital Camera

1 Answer

Focusing issues with canon 40D when taking sports shots

I believe I have found my problem. I think my image stablizer on my lens is on the brink! I turn it off and got good pictures.

Jun 03, 2009 | Canon EOS 40D Digital Camera

1 Answer

Wet olympus E-500

PLease take the camera to a service station before the whole things shutsdown due to liquid damage .... normally it does not show immediately but in the long run it will give probs...

Oct 12, 2008 | Olympus EVOLT E-500 Digital Camera

1 Answer

Canon EOS 40D shooting in RAW

You are quite correct!!! RAW only works in any of the creative/manual modes.

Sep 21, 2008 | Canon EOS 40D Digital Camera

1 Answer

Canon EOS 40D aperature issue

Check the operators manual - you need to 'activate' the aperture control.

Jul 15, 2008 | Canon EOS 40D Digital Camera

2 Answers


check this site for specs. I believe that the Canon 40d will.

May 28, 2008 | Canon EOS 40D Digital Camera

1 Answer

Not shooting

Are you using a genuine Canon grip? I've experienced contact problems with generics. That's not to say that you couldn't have the same contact problems with a Canon grip.

Apr 01, 2008 | Canon EOS 40D Digital Camera

Not finding what you are looking for?
Canon EOS 40D Digital Camera Logo

Related Topics:

98 people viewed this question

Ask a Question

Usually answered in minutes!

Top Canon Cameras Experts


Level 3 Expert

102366 Answers


Level 2 Expert

169 Answers

old marine
old marine

Level 3 Expert

2012 Answers

Are you a Canon Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides