She pays £25 a month to rent a set- and will have paid out the market price on this one several times over. She'll now be getting a LCD for the same price. She's been hanging on because she hates change. Perhaps she doesn't want to hurt the old set's feelings. I mention this because that's the way I think. Perhaps it's inherited.
Afterwards we poked around some more and found the TV was fine- and the thing at fault was the SKY Box- but we're not rescinding the order.