Having problems with your Canon EOS 40D Digital Camera ?

40D turns off as I press shutter button

\015 The machines is with the newest firmware 1.1.1 and using a fully charged Canon battery. When I pressed half shutter, it will focus, but when the shutter is fully pressed, the machine just shuts down. It would not open up unless I eject the battery and insert it again. Appreciate for your kind help\015

Answers :

This is most likely a motor problem. Canon had a quality control problem with the motors for this model, due more than likely to bad quality control at the Chinese plant that manufactured them. There are two identical motors in this (and more recent model Canons). One ***** the shutter, the other moves the mirror up and down. Both also have phase switches that can become 'dirty' because of the excessive grease put in the gears during manufacturing.

The motor(s) freeze, and you get the problem described. If the mirror goes up and then it fails, it is the shutter motor. If the mirror fails to rise, then it is the mirror motor.

A shutter failure can also cause problems, but it runs about three to one that it is a motor failure.
The shutter mechanism had to be replaced. I've heard that this is a typical 40D problem, due to a shutter design flaw. They say that it has been fixed on replacement shutters.
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