Vizio GV47L not turning on after a pop noise

Question

I have a Vzio GV47L LCD tv. We bought this about 13 months ago. The other day when it was on and working fine a loud pop noise came from the TV and the screen went black. I couldn't turn it off or all controls didn't work. The only way I was able to turn it off was to disconnect the power. I waited a few minutes and plugged it back in. I went to turn it on and it seem to come on as before but atfer the initial click with the touch screen buttons lighting up it locks up and nothing else happens. No control operations at all, just the touch screen buttons lit up and a black screen with no sound. Can anyone help please? I am very mechanically inclined (30yrs German car mecanic) so I'm not afraid to get into this.