I hate to say it, and I'm no expert, but that doesn't sound good. That really sounds like a hardware failure. Hope you're still under warranty?
riviera74 wrote:Have you tried a different HDMI port or different cable?
That kind of thing is always worth a try, but if it was a port/cable problem he should still be able to see the OSD even if the TV didn't like what it was seeing from its inputs. Without an OSD how do you even tell it to use a different port?
I suppose you could try shining a bright light at the screen and looking at it closely (perhaps from an angle) to try to see if the picture is still there but the backlight is off.
(BTW, I was shopping for TVs this holiday season and I thought LG only had 47" models in its LED line, whereas the 46" ones were conventional backlights. Which model is this exactly?)