20 Most Recent Canon EOS 40D Digital Camera Questions & Answers

Sounds like a loose screw inside shorting out one of the curciut boards! tccamerarepair.com

Canon EOS 40D... | Answered on Feb 01, 2018

U just nd to switch it of after sometime then charge after it ful u can open

Canon EOS 40D... | Answered on Oct 20, 2017

You need to use the card reader the came with the Eye - Fi card as this has some sort of code in it that runs when the Eye-Fi card is inserted

Canon EOS 40D... | Answered on Sep 23, 2017

Put the camera in a bag of rice to dry it out, rice will absorb any remaining liquid, after 3-4 days remove it and see if it works, if no joy, then a new camera is in your future.

Canon EOS 40D... | Answered on May 19, 2017

Possibly corruption of the card - if you are sure the images are backed up, then format the card.

Canon EOS 40D... | Answered on May 17, 2017

Have a look in the manual - some cameras have this as a 'fail-safe' in case people forget and leave them unattended. There may be a way to disable this 'function' in the menu system.
Just looking at an answer to another similar query for this model, you may also need to disable 'automatic shutdown'.

Canon EOS 40D... | Answered on Jan 11, 2017

Hi Carol,
There are two things that I can think of which will prevent you from sighting through the view finder.
1. When your camera is switched on for live-view shooting mode or vice versa. That is, you can only see the subject in the LCD screen or through the view finder one at a time.
2. If you are using the LCD screen to frame your subject and you encounter this problem, it is most likely caused by the settings of the camera. Try increasing the ISO to around 400 or above, reduce the shutter speed to anything below 1/20 and the aperture to around F:5.6 or less (that depends on your lens.
Hope you resolve the problem by now but if you haven't try those tips.

Canon EOS 40D... | Answered on Oct 03, 2016

Hi John, you are asking for opinions on the best remote control and I believe you would be better off if you do a search on the reviews of remote controls for canon cameras. There are heaps of websites you can obtain such info. in details rather than you pose your question here.

Canon EOS 40D... | Answered on Jan 25, 2016

I had the Error 01 message on my 400D
I changed the support battery ( CR 2016 3 V) which is placed inside the main battery compartment.
This did the trick.

Canon EOS 40D... | Answered on Sep 09, 2015

If your photos and videos are stored on the memory card, then remove the memory card from the camera and insert it into an USB memory card reader. Connect this USB memory card reader and memory card into the USB port of your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos and to your computer. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

Canon EOS 40D... | Answered on Apr 05, 2015

In custom functions you have a place to enable or disable High ISO expansion. If it is set to disable then you will not see it as a choice.

Canon EOS 40D... | Answered on Nov 28, 2014

1.Remove the battery, lens and CF card. Allow the camera to sit without power for 20 minutes and then reinsert a fully charged battery.
2.Turn the camera on and push the shutter button as if you were taking a picture.
3. If you don't get the error message reattach the lens and insert the CF card.
4. Check the below canon eos 400d service manual link:

it will help you to save a lot of money
Hope it helps, Thanks

Canon EOS 40D... | Answered on Nov 25, 2014

Err 01: Lens to body communication error
1.The camera to lens communication is somehow being interfered with could be a problem within the lens itself, possibly the camera body, or something as simple as a smudged fingerprint on the lens mount contacts,
2. Check the lens and the contacts
3. Also check below link if you need a canon eos 5d service manual


Canon EOS 40D... | Answered on Nov 25, 2014

did you try to press the display button several times, while in shooting or in display mode? could make the difference.

Canon EOS 40D... | Answered on Nov 20, 2014

Try doing a "hard reset" to clear all the camera settings to factory specs:

  1. To reset the camera, remove main battery and back-up battery (Backup battery compartment says CR2016 3V on the wall of the compartment is a little tray that slides out)
  2. Turn the camera off/on switch to ON
  3. Wait 10 sec turn OFF
  4. Replace batteries.

Canon EOS 40D... | Answered on Aug 14, 2014

You need to either change your ISO setting to something higher, use a faster lens or switch to manual settings.

Canon EOS 40D... | Answered on Aug 14, 2014

Using your fingernail, push in the lens contact pins in the bottom of the mirror box several times. Sometimes they get tarnished and make poor contact with the flexible circuit under them. Doing this scrapes off the tarnish.

Screws come loose from the bottom circuit board and short it out. It contains the flash circuit so a short can throw 300 plus volts into a 6 volt circuit, damaging components. The lens contacts flex attaches to this circuit board. This is a common problem.

Impact can cause flexible circuits to either come loose from their connectors or have one side pull out so some of the lands on the flex don't make contact. Did you drop the camera?

Canon EOS 40D... | Answered on Jul 30, 2014

This is obviously a problem with the internal parts of the camera. There are too many things it could be to give a definitive answer, and it would be too complicated for an amateur. If you take it into a local camera shop they should be able to run diagnostics on it and replace the problem.
Best of luck to you.

Canon EOS 40D... | Answered on Jun 14, 2014

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