Canon 300D - Autofocus stopped working - troubleshooting options?

Discussion in 'Canon' started by Michael, Feb 17, 2009.

  1. Michael

    Michael Guest

    Autofocus on my Digital Rebel has stopped working - intermittantly.
    Lens seems to detect the need to adjust but all I get is a "clunk" as
    if its trying to revolve against a locked mechanism. Failing to get
    exposure green light too.

    Ive checked lens settings, tried several lenses and experimented with
    various programme modes - but no joy. Seems particularly affected in
    low light - but definitely a marked deterioration on how it used to
    operate previously.

    Before I comit to a professonal repair - can anyone suggest some
    further checks or trouble-shooting routines I can carry out ?

    Michael, Feb 17, 2009
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  2. Michael

    Pat Guest

    Pop the lens off and look at the mirror and see if you broke a hinge
    on the top of the mirror. It won't hurt it to shake the camera a
    little bit while you're doing it and maybe use something soft to see
    if the mirror is firmly in place.
    Pat, Feb 18, 2009
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  3. Michael

    Bob G Guest

    Check your battery strength.
    Gently clean the lens contacts on the body with a pencil eraser.
    Good luck.
    Bob G, Feb 18, 2009
  4. Hi,
    some ideas:
    - remove the lens, put the cam into "sensor cleaning mode" and use a blower
    to clean the AF sensors located at the BOTTOM of the mirror box
    - maybe the sub mirror is broken, it´s common on 300Ds: look here for
    details and repair guide:

    Markus Fuenfrocken, Feb 18, 2009
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