Hi, My camera was working fine until I was fiddling with it a couple of days ago. And now it won't focus when I zoom in. There is a series of three high beeps and a green circle appears in the upper right of the fram when I depress the shutter half way. Depressing the rest of the way results in a blurry photo. I don't know what I've done. The manual isn't much help. Can anyone offer a suggestion?