Last week it went pop and then failed to turn on.
I googled "samsung tv not working" and it returned hundreds of similar problems.
It seems Samsung LED TVs are prone to a capacitor in the power supply failing, luckily it also provided a fix.
One trip to Maplin, a £0.37 capacitor and 30 minutes later the TV is working again

So, if you have a Samsung LED tv that stops working, do a google search and you could save yourself some money
LOL, there's also a business opportunity there for someone, ebay is full of broken Samsung TVs with the description matching the symptons shown by my tv