From experience with Laptops and LCD monitors the rear backlighting appears to be high on the list of components which fail. Question if true for LCD TV's 1. Are they easy to replace, can a competent user do it? 2. Are they expensive? 3. How long will parts be available, I expect to keep my next TV 10+ years? Also what is deemed to be acceptable number of damaged pixels visible on the screen? On Laptops we specify three as the max and are not in the main viewable area i.e central area. Can I expect zero pixel faults and what are my consumer rights in this area?