Question about Canon PowerShot S400 / IXUS 400 Digital Camera

1 Answer

Blank LCD screen

I've had the Canon IXUS 400 for quite some time now and has always worked without problems. However one fine day The LCD screen went blank. It can still take photos and I can see them on the PC, it can zoom and presumably focus but there is no way I can see what I am shooting. What can I do and will it be worth repairing?

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  • clinkmann Feb 04, 2008

    I'm not sure about the "DISP" switch as the camera was being used by my wife and later my son, though none claim to have modified the settings. The pictures on the PC are good, not different from photos taken when the LCD was working.

    At first there was a very faint "Canon" visible on screen as soon as it was switched on, but now even this is no longer visible.
    I suspect that the LCD backlight is the problem but I'm not sure.

    Also I opened up the camera (having already had to do so some 1 year ago as I had to remove the internal battery to reset the firmware back to default) and removed the internal battery but there was no change.

  • clinkmann Feb 04, 2008

    Thanks for your replies. I did press the DISP switch but no luck. Thanks also for the info on the flash capacitor - I completely forgot about that. I had jiggled the cable before but with no useful results.

    Problem is, should I get a new camera with better specs or try to get a replacement screen (unfortunately I couldn't find the backlight on its own)?

  • clinkmann Feb 04, 2008

    I checked the battery and at full charge (I charged it yesterday) it is reading 4.0V (+ and ground or + and -) - so I presume it's good.

  • clinkmann Feb 04, 2008

    OK - It's almost fixed!! I decided to go through your suggestions once more and removed all connectors and reassembled. Just before closing the camera back into its case I tried it and it worked. I closed it and the screen went black again!. AFter several attempts it now appears to be a problem with a switch (switching between viewing and shooting). I will have to open the camera once more and see what's wrong with it - I suspect that on closing the case the external 'switch' is not aligned with the switch on the camera. Thanks for your tips t00nz.

  • eymoreno Feb 09, 2008

    I've had the Canon IXUS 400 for quite some time now and has always worked without problems. However one fine day The LCD screen went blank. It can still take photos and I can see them on the PC, it can zoom and presumably focus but there is no way I can see what I am shooting. What can I do and will it be worth repairing?

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  • Canon Master
  • 4,738 Answers

First, let's try the obvious. Did you accidentally hit the "DISP" button (bottom row of buttons, third from the left)?

If not, you mention you can see the photos on the PC. Do they look fine, or are they also black or distorted?

Posted on Feb 04, 2008

  • 1 more comment 
  • CameraR
    CameraR Feb 04, 2008

    Your mentioning of the faint Canon logo does suggest a backlight problem. You'll probably need to open the camera again. The Sxxx series cameras are particularly cramped inside, with many components jammed into a small space:



    http://www.ixus-world.de/index.htm?tips/...



    Would first suggest checking the LCD screen's ribbon cable connection to its connector. Reseat it or even just jiggle it to see if that reestablishes a good electrical connection. If not, next step would suggest replacement with another backlight and screen (suggest ebay looking for an S400 to cannibalize, BUT with a stated working screen). Here's some example replacements. Sorry no S series, but a lot of SD series:



    http://camerarepair.blogspot.com/2007/11...



    And finally, since you might be opening the camera, remember the shock hazard of the flash capacitor, and how to discharge it:



    http://camerarepair.blogspot.com/2007/11...

  • CameraR
    CameraR Feb 04, 2008

    Oh but first, humor me and press the DISP button one time with the camera on, just to confirm that the LCD was not turned off.

  • CameraR
    CameraR Feb 04, 2008

    Oh, there's one more obvious thing to check before opening the camera, the battery. When was the last time you changed out your rechargeable battery? If your still using your original S400 battery, it should be wearing out about now. You can check it with a voltmeter.

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