Camera turns on, but won't take photos

melcat wrote in post #13561353
I forgot to say: With the eraser you don't rub back and forth, just use a single stroke.

Like a ninja dispatching his enemies.

I would try the rubbin' alcohol first, though, since eraser tricks don't work long-term (especially if the problem is that there is too little contact from excessive wear).

FWIW, this just happened to my 30D when my wife used it taking pictures of our kids with Santa. I tried cleaning the lense contacts with an eraser; nothing. Then I used alcohol; nothing. I removed the lense and it the shutter would finally release. So I swapped out the 28-90 lense that was on the camera for my 75-300 and it worked. I put the 28-90 back on and zilch so I knew it was the lense. I switched the lense from AF to MF but the focus ring wouldn't move, and it still wouldn't take an image. With a little "gentle" pressure applied, the focus ring clicked and I could manually focus... and the camera snapped an image. I switched it back over to AF and the camera worked again. My wife was transporting the camera in her purse in her car and something might have disturbed the focus ring just enough so it wouldn work. Glad that's solved but I'm not sure if I did any damage to the lense with the "click" of the focus ring. Food for thought.