To everyone having this C31.22 or 23 problem, as I was - unbelievably, the answer is to smack the side of camera sharply with the palm of your hand a couple of times. I know it seems mad, but it worked for me, and if you look at the forum on camerahackers.com http://66.102.9.104/search?q=cache:vAfylfj9ax4J:www.camerahacker.com/Forums/DisplayComments.php%3Ffile%3DVideo%2520Camera/Sony/Sony_DCR-TRV18_-_Error_Code..html+sony+camcorder+error+message+C31.23&hl=en&gl=uk&ct=clnk&cd=1I
you will see that it worked for dozens of other people too.
Isn't the internet a wonderful thing?!
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