I have several Sony Camcorders but the problem is with the Model CCD-TRV118. After I bought it second hand, a few weeks went by and I started getting the error message C31-23. Someone told me it is the memory battery other than the NP-FM50 BATTERY THAT POWERS THE CAMERA ITSELF. I have looked everywhere and cannot find this battery. Can you tell me if this is the problem and where the heck is this battery. I found a plastic plate in behind the NP-FM50 battery with one screw in it. I removed this plate to look behind it and there seems to be a ribbon connection slot or connection devise. Can you explain what this is for. Your help is much appreciated. Thankyou in advance. Alan Glover

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