Sony SLV SE720 G picture rolling on screen, HELP

[jezza]

Hello
After not using it for about 6 months we tried to use our sony video recorder again last week, everything is fine except on playback of videos the image rolls ( or a short while you might see a man as he is ment to be and then his head dispears slowly into the top of the screen appearing again at the bottom) We checked the manual, which says its a roblem with the TV, but the TV is fine and works ok with other equipment including other VCRs, ant advice or help would be welcome