This is my 2nd Q8FN 55" TV and both occasionally do not fully turn on. ILooking very closely at the TV, I can see that the LCD is on and hear the power-on chime but the backlight doesn't always come on. I have to unplug the TV or hold the power button to reset the TV. The backlight then powers on as usual and I can see the menu system. But I na few hours or the next day the same thing happens. Is this systematic ie. a model wide problem? Manually updating to the latest firmware did not help the issue.