I have a serious issue with a EOS 1D Mk II; yesterday i was working with that camera and a couple of lenses (frequently switching); one of those was a 70-200 IS. Suddenly the AF stops working, along with the shutter release and all the leds within the viewfinder. On the top screen was blinking the "Err 01" code; I thought it to be a lens/body communication issue; but even dismantling and mounting back the lens, the problem was still there. Tried to clean the contacts. Nothing Turned Off/on the camera, removed the battery. Nothing. Changed the lens, tried to release the shutter without any lens. Nothing again
There was a lot of discussion of this when the Mk II was new. Many people "fixed" it doing just the things you did. Also, some reported that mounting the lens on another camera "fixed" it. IIRC, in the end it ended up being a lens issue. IS module. Canon can repair.
Posted on Aug 16, 2007
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no af working
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