The TV is about 6 years old maybe 7 but has not had heavy use. It first happened only 2 weeks ago. The first time it went into standby suddenly and restarted to TV mode. Recently it jumps out of AV mode and back into TV mode with a tuning warning on screen (normally only there when I first switch the TV on). When it is having one of its episodes the remote functions are unresponsive or delayed. There is no stopping once it starts doing its own thing as it occurs every 30 - 60 seconds after this.