Is it bad that my 42 "Panasonic LCD TV use as a monitor for my PC?
I spent a fortune for this TV, and wonder whether the PC connected to TV with a VGA cable would affect the health of the TV or something, or just plain bad for them?
It will not hurt TV at all. Remember that an analog VGA signal, so it will not be in HD (if your graphics card capable of HD). You may need the resolution of your Computers adjust to fit the TV.
Panasonic LCD TV- The Various Options