DId you ever have any issues with the lamp/TV shutting off? On my set, every so often, I will turn the TV on and a few minutes later the lamp and Tv shuts down for some reason. Which is separate from the TV automatically shutting off when there is no signal.
It's only happened a few times and hasn't really been a big deal. But I wonder if this is a precursor to the lamp dying? I never did get a spare bulb.