Then why do surge protectors sell so well?
I agree that 22 months is still not a reasonable length of time for a TV to last however would people on this forum stop believing that 6 years is the reasonable time. 6 years is the window for which the law allows you to make a civil claim. This is a basic principle of tort law, has nothing to do with SoGA except for the fact that you can claim under SoGA within this time. This DOES NOT mean that goods should last for 6 years.
As a Law graduate, I had to add this as too many people are under the misconception that the 6 years is the 'guarantted' lifespan of a device. SoGA (as with all law) is a guideline, not literature and the court has the right to percieve it in any way they see fit re the "reasonable timescale" clause.
A lot of people here know what they are talking about and make successful court claims. However a lot of people here take the law how they want to periceve it instead of by what it actually says.
Sorry for the rant, i just had to jump in.
By the way, the way you were treated by the manager was not acceptable and you should get a replacement TV or a repair from currys.