Question about Canon EOS 400D / Rebel XTi Digital Camera

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Canon 400d new batteries installed but will still not turn on.

Was working only a week ago

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  • 19 Answers

Might seem obvious but check that the green light on the charging unit showed that the battery was fully charged before you put it in the camera. Make sure that the memory card is fully seated in the slot. If ok then either the charger is not charging or the on/off switch is faulty.

Posted on Jul 14, 2009

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2 Answers

When The battery on my Canon 400d goes flat it loses the date and I have to re set it. I didn't need to do that until recently.


There is a small backup battery in the main battery compartment. I believe the XTi uses a CR2016 battery. It provides backup power to maintain the camera's settings when the main battery is removed.
Bob Kilbourn www.camerarepairs.com

Apr 28, 2011 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

Canon eos 400d error 99, shooting not possible. turn the power swithch on off again or re-instal the battery. It has been doing this for a long time and nothing is working to fix it! Thank you,


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:
http://goo.gl/LHYVAy

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

Oct 22, 2010 | Canon EOS 40D Digital Camera

1 Answer

My 400D won't turn on


Did you overtighten the tripod screw?

Aug 16, 2009 | Canon EOS 400D Digital Camera

1 Answer

Error 99! Wont' take picture, the message states


Go to the www.canon.com website and find out what Error 99 means. ted10

Apr 18, 2009 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

My Canon is displaying - Err 99 what should I do?


This can mean a host of different problems but try these things to fix it:
  1. clean the lense contacts as poor conection between the camera and the lenses can cause this. Also clean the contacts on the body of the camera.  The contacts should be cleaned with a plastic eraser, but make sure it is clean before using it.
  2. Clean the battery contacts (on the battery)
  3. Change lenses and see if you have the same problem (does it only have this problem on one lense?)
  4. Make sure you have the lates firmware installed.
Don't swap lenses while the camera is writing to the memory card, lots of things like this can cause this error message. Also the flash can cause it.
Usually the lense is the culprit so make sure it is fully cleaned.
Cheers
E-man

Sep 08, 2008 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

Canon eos 400d


Contact Canon - some makes of lens which are not Canon are not electronically compatible for various reasons, and can actually damage the camera. So, get using the phone and check if it is compatible before doing anything else - but personally, I would not use the lens until I find out

Jul 02, 2008 | Canon EOS 400D / Rebel XTi Digital Camera...

1 Answer

My Canon is displaying - Err 99 what should I do?


See if Sigma has any updated advice on this. Otherwise, I don't mean to sound rude or harsh, but unfortunately you may be out of luck with the compatibility...you will need to get a Canon lens. Error 99 is just a communication error and cleaning the contacts is about all you can really do so if that hasn't worked...I'm sure this is not the news you want to hear, but contact Sigma if you haven't already and see what they say.

Take care!

May 30, 2008 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

Canon EOS 400D


The camera is working again. I took out the battery, with the the on/off switch, off. I then swtiched the On/Off switch On. I then put the battery in ,and the camera turned on.It then gave me an ERROR 99. I then switch it off and on again, and it is still working.

Apr 28, 2008 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

Error99... pls help!!


here is a link for further steps to take on Error 99: Canon info

The article refers to the 30D, but the same troubleshooting will work for your camera too

Feb 17, 2008 | Canon EOS 400D / Rebel XTi Digital Camera

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