I purchased a Toshiba 36zp18p from a mail order company approximately 2 months ago. Apart from the minor problems described on many threads about this TV, (such as the trailing on fast moving objects), I have been reasonably happy with the set. However, I soon noticed that there was a small patch in the bottom left hand corner which seemed lighter than the rest of the screen.This was particularly noticeable when viewing a light background such as a skating rink or a blue sky.The main part of the screen seemed 'dirty',particularly when compared to the bottom corner. I phoned the Toshiba technical helpline who suggested that the set is turned off regularly and this could cure the problem.However this did not happen and I recently requested an engineer from the mail order company. The engineer duly arrived last Saturday and soon came to the conclusion that the set required a new tube. I have been in touch with the mail order company today, and they want the set to be returned to them for repair, which could take anything up to 4 weeks. Obviously, I am reluctant to be without a TV for a month and am also worried about such a major repair on such a new (£1600) TV, which has had the fault since day one. I realise that I should have reported the fault immediately, but as I didn't I have some questions:- Has anyone else had a similar fault? Have I got any rights to a new TV rather than a repair? Should I be worried about the repair itself, eg could a replacement tube cause other problems? I would be grateful for any advice.