My 7 year old 40" Samsung went out today (I use it for everything TV, Xbox, PC and vga notebook too) ... I pushed everything you could push, I clicked the remote control, I changed the batteries and then I changed the power cord, but still no power. Then I tried a heavy duty power cord I had for a pressure cooker and wham it came on with that silly little ring tone tune.
Boy was I happy so I just ordered a 32" no brand name TV for a back up just in case it happens again. Very hard to find a new TV with VGA now days.
Now I can use it for a security monitor too