If your RX100 camera is showing the error, "Turn power off and then on" and the lens will not retract completely, see below for the simple fix.
My RX-100 started showing this error message, and initially was able to turn off/on and shoot photos, but after a few days it was constantly showing the error and would not work any more. The lens barrel remained partially retracted and would not fully extend. There is no reset button.
I found a simple fix via an internet search, partly in German I believe. This little fix saved me $300 and a lot of hassle.
No parts required.
Turn off the power.
Remove the 5 small screws on the bottom panel.
Lift off from the narrow end on the battery panel side. You may have to open the battery cover. The other end is hooked to the body. There are also 2 small tabs on the mid front side.
Remove the 2 screws on each side, total 4.
Gently separate the back panel and front panel. You do not need the separate the panels completely.
With battery in, power on and it will start up and the lens barrel will extend fully as it should.
Turn power off and it should retract completely and lens cover should also close.
Replace 4 screws on the side, and hand tighten.
Replace the bottom panel, wide end with hook and 2 small tabs on the mid front side in and replace the 5 screws, again hand tighten.
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