Problem: Certain CF cards (Sandisk extreme III & Transend) do not work in my canon 30d . I get a “CF err” message when turned on. The extreme III has never been used.
-I have tried formatting the cards in the camara (sometimes get err 99 message)
-I have tried formatting the cards on my pc and then again in camera
-both cards work fine in other canon SLR’s
-a lexar card works fine in the 30d with the problem
-cleaned connections between lens and camera
-batterys are fully charged
-battery & card has been removed for a period of time from camera
-reset to camera default settings
-updated firmware for 30d
-checked connections in both problematic cards
Dirty or corroded connection pins in the camera might be the problem or possibly a bent connection pin.
I am having similar trouble with a nikon d70 hich i converted for IR