I've been pottering all day apart from having to take my camera into the local shop. I thought it needed a new memory card, but no, it needs a new card reader which is of course, part of the main circuit board and costs £220 for the part. Aaargggh. It's not really economical to repair so I'm off to get a new one. I fancy the same make because I'm familiar with it, but maybe the updated version - Cannon G15.
I've also been playing with a sponge roller and acrylic paints. The first version of this was a quick one using charcoal, which was too clumsy. I like this one - using inktense blocks - much better.