Fix it by your self.
Canon 40d shutter button repair.
Originally posted ages ago.
Don t waste your money.
As i said i would do a search about it 20ds seem to have this problem.
My 40d shutter failed after 16 700 actuations.
Yer ive heard of the issue with the 40d shutter button before and it turned out to be dirt under or within the button compartment.
For this replacement the front back and top covering of the camera must be removed to get to the shutter button.