David, now I am worried. I followed your letter to the T. Nothing worked.
You can test by plugging the camera into the PC. Did it.
The screen should blank and the blue LED light.
On removing the plug, or waiting ten seconds, it should take a photo. No blue LED light, 10 seconds, no photo
If you insert and remove the plug quickly enough, it should go into autofocus mode (and stay in that mode).
If you insert the plug again, the screen should blank, etc. Nothing. at all.
You have to do that quickly.
An SX10 tester told me that everything worked OK.
There is something else that you can do ...
Enter ALT mode and half-press the Ricoh.
At top left on the screen it should briefly display 'USB'.
You may have to press a number of times, it will not catch the pulse every time.
Tried it, did it for 3 minutes, no display on on upper left [no right, no lower] .
My usb does do other things, so now I feel that my camera has a problem. David, What to you think?
I looked at my photos on the card and using the Ricoh, I was able to change the photos forward. That is weird. The Ricoh does something, not what I wanted, but it worked on something.