Canon Ixus Elf APS Camera failure with lens tube extended?

My Canon Ixus Elf APS Camera (you know, the original Ixus) worked superbly well. It then failed with its lens tube extended and a flashing H (help) symbol in the display. I have removed some screws and the back, but so far have not reached the vital parts. Has anyone else had this problem with the Ixus APS camera (or any other APS or digital camera)? Any assistance appreciated. It seems such a shame to sling it.