Which is a 37" Samsung TV... Which would, more and more often, refuse to come on. Isn't the internet wonderful? A quick Google pointed to the power supply board and a likely dodgy capacitor. Sadly the miscreant didn't expose itself with a knowing bulge, so I replaced all 13. Astonishing how little is inside a modern LCD TV - only two main boards, and the PSU one was larger and seemingly more loaded than the actual 'TV' board.