theeightsixty

The tricky part is whether or not there is crackling when the other sounds are played because they all use the same speaker. One thing to try (to pin down if the speaker is bad) is to turn off the mechanical shutter, turn on the electronic shutter and use each of the sound effects for the shutter sound. [This is on page 191 of the manual]. If they are also messed up, the speaker is most likely fried.