Interesting... My 6 year old Sony TRV9 also has an intermittent fault where the video shows a magenta cast when switched to standby, but I switch it back off and then on again and it usually goes, so it doesn't affect the recording. As it is an intermittent fault and I can get round it I was not prepared to pay the £70 I was quoted for it to be looked at, since it probably wouldn't happen whilst at the repair shop, and I need a new cam anyway. However, no-one I have asked about it has any idea what can cause it. Sorry I can't help you, but if you find an answer please post it.