Question about Canon EOS 400D / Rebel XTi Digital Camera with 18-55mm Lens

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I have a canon rebel xti with an 18 to 55 lens .. I recently bought an external flash to sit in the hot shoe .. now when I removed the flash from the hot shoe .. the cameras own flash will not pop up and work... I can manually pop the flash but it still will not work..  I thought that when I bought the flash at the camera store the sales person turned off something on the camera for the new flash to work.. is there something I need to change in the menus to get the cameras own flash to work.....

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I had the same problem.
Look closely at the hotshoe. Inside it, way over to the side, under one of the tabs on the side, is a tiny metal strip. When you attach an external flash, the strip is pushed down and holds down a tiny button that deactivated the pop-up flash. The strip can get bent so that it doesn't let the button come up even when the external flash is removed.
Very gently take a fingernail or a jeweler's screwdriver and run it underneath the metal strip. I had to do it a couple of times to get mine working again, but it's working great now!

Posted on Feb 18, 2009

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The camera flash will only pop up automatically when in the automatic modes. When in Creative modes (M-DEP, M, AV, TV or P) the flash will stay down unless you press the flash button yourself.

Posted on Feb 05, 2009

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1 Answer

I have problem, my 400D auto pop up does not work please help me


there is a sensor under the lip of the hot-shoe, you need a very small screw driver to lift up the piece that pushes down on the tiny button that tells the camera that there is already a flash mounted. this was caused by leaving the external flash on too long. try it, good luck. the sensor button is tiny., may need magnifying glass.

Dec 29, 2012 | Canon EOS 400D / Rebel XTi Digital Camera

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The flash on my Canon Rebel xti is not working. the flash pops up, but it is not lighting. I saw some responses about people using q-tips and alcohol, but I do not know what exactly you mean and it is...


I think people were talking about cleaning the flash shoe, in case you use an external flash. However, there is a microswitch under the rails of the hotshoe on top of the camera that could be stuck in the down position.
If that's the case, some people use a toothpick to release it to the "up" position. If this switch is stuck, the camera thinks you have an external flash attached and ignores the popup flash.
The little pin people are talking about is the switch beneath the rails of the hotshoe. You might try to use the qtip and alcohol if it looks dirty. Take the camera in to a repair shop and just ask them where it is if you're still having a problem identifying it.
Good luck, and hope this helps.

Sep 25, 2010 | Canon Rebel XT / EOS 350D Digital Camera

1 Answer

I recently bought a used canon EOS 400d which was


Be aware that the built in flash does not pop up automatically in all picture modes. Try it when in the different modes (on the mode dial) and see what I mean. Does it popo up when manually opened ?, (small button on front left hand side of the viewing pentaprism/flash housing.)

Oct 02, 2009 | Canon EOS 400D / Rebel XTi Digital Camera

2 Answers

Err 99


err 99 means there is moisture inside of the camera, probably inside the hot shoe

Aug 25, 2009 | Canon Digital Rebel XTi 10.1MP Digital SLR...

1 Answer

My camera is a Canon 400D. I put an external flash on it just few moments ago (canon speedlite 580EXII) and the flash wouldn't go off when i took pictures. So i took the flash off, but now the flash on the...


Hi Chrissy, I had observed the same problem - after an external flash had been removed from the camera, internal flash didn't pop up. Tried to look at the Google and finally found the solution. It helped me and could help you as well:
The usual reason is that the camera thinks that there's an external flash mounted on the hot shoe. Check the external flash detect switch. It's located under the right side of the shoe (there is a metalic piece which is kind of "elastic". Just try to push it and release several times, may be put the screwdriver softly under it and out... It helped me. Here is the picture of location of the detector.

Jan 11, 2009 | Canon EOS 400D / Rebel XTi Digital Camera

4 Answers

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I found the answer and fixed my flash. Look on http://photo.net/bboard/q-and-a-fetch-msg?msg_id=00ODWf

This will describe how, if you have been using a speedlite alot, than the little tab under the shutter release side of the hot shoe can get bent down thus constantly pressing down (toward the bottom of the camera) the small button which deactivates the pop-up flash even when the speedlite is not attached. Just bend the tab up a little with a jewler's screwdriver, turn the camera off and on and voila!! Fixed!!! Dan describes pushing the tab down, but on the xti, the tab needs to be bent up to release the flash deactivation switch and fix the problem. Thanks to Dan D on photonet for saving me a service call.

Feb 03, 2008 | Canon Rebel XT / EOS 350D Digital Camera

1 Answer

Images shoe up red


sounds like you might have an overheating CCD. Turn off the camera for couple of hours and when you try again if this happens again, return it to the store you got it from for warrenty repairs.

Jan 06, 2008 | Canon EOS 400D / Rebel XTi Digital Camera...

3 Answers

How to switch on Auto Flash in Auto mode


Put the camera in "P" and press the flash button above the lens release. If the flash pops, than you probably just have too much light to need it when you are in auto. The flash button is not active in auto so if the xti doesn't want the flash in auto, u can't make it fire. If the flash button does not make the flash pop in "P", search this site for another post about flash not working and u will find that this could be the flash deactivation button in the hot shoe sticking. Not likely though with a new camera unless u have had a speedlite mounted alot.--

I found the answer and fixed my flash. Look on http://photo.net/bboard/q-and-a-fetch-msg?msg_id=00ODWf

This will describe how, if you have been using a speedlite alot, than the little tab under the shutter release side of the hot shoe can get bent down thus constantly pressing down (toward the bottom of the camera) the small button which deactivates the pop-up1.gif flash even when the speedlite is not attached. Just bend the tab up a little with a jewler's screwdriver, turn the camera off and on and voila!! Fixed!!! Dan describes pushing the tab down, but on the xti, the tab needs to be bent up to release the flash deactivation switch and fix the problem. Thanks to Dan D on photonet for saving me a service call.

Dec 26, 2007 | Canon EOS 400D / Rebel XTi Digital Camera

2 Answers

Flash doesn't work


I found the answer and fixed my flash. Look on http://photo.net/bboard/q-and-a-fetch-msg?msg_id=00ODWf

This will describe how, if you have been using a speedlite alot, than the little tab under the shutter release side of the hot shoe can get bent down thus constantly pressing down (toward the bottom of the camera) the small button which deactivates the pop-up1.gif flash even when the speedlite is not attached. Just bend the tab up a little with a jewler's screwdriver, turn the camera off and on and voila!! Fixed!!! Dan describes pushing the tab down, but on the xti, the tab needs to be bent up to release the flash deactivation switch and fix the problem. Thanks to Dan D on photonet for saving me a service call.

Dec 02, 2007 | Canon EOS 400D / Rebel XTi Digital Camera...

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