TV is a few years old now and has started coming up with "Progammes not stored message" .... If I do a digital re-tune the programmes/channels are available ... However after powering off the TV set , they are lost again ( at least I suspect this is the reason) . Is there a battery backup memory system used to store the tuned channels and a battery requires replacing or is this a symptom of a board problem. I notice other threads refer to this problem but not answer appears to be forthcoming ... Any technical help would be appreciated ... thanks
