We have had this DVD recorder for over a year now and it has never worked properly. It locks up constantly and doesn't like you pressing the buttons too quickly one after the other. Originally i phoned the tesco helpline and they were keen but useless. It appears that the only way to reset it is to un-plug the machine, leave it for a good few minutes, then plug it in again. I would have thrown it away a long time ago, but it was our only recorder for a while and now we have SKY+ so we rarely use it (even for playback).
No other fix that i can suggest, except live with it or throw it away, sorry.
Pete
February 2009