Thanks all. Clarky's suggestion rectified the problem as he so confidently predicted.

Thanks for your prompt responses. Indeed changing the lense seems to sort the problem so I think you are very much on the right lines, though I can't see anything wrong with the lense I was using.

For no reason I can see, my newly acquired K100D Super has ceased to work. On switching on, the LCD shows the remaining nymber of shots, a flashing Av and two dashes.
Playback works, the menu button gives a display but other controls are non-functional and it won't take pictures. The camera is not brand new and not in warranty, but is in very good condition and was working well.


Any suggestions, and what exactly does Av stand for?