Today, my Canon 40D has stopped shooting and I get the infamous Error 99 message; which can mean virtually anything.
Have done basic checks, so it isn't a fault with battery, or CF card. The mirror goes up OK and all lens functions work. Flash also fires. Was shooting under normal conditions.
Any other suggestions for checks?
And yes, it has taken quite a lot of shots. I probably 'go round the shot images clock' more than once a year.