|Apparently LG M237WA is a TV that can be used as a decent computer monitor via it's D-sub (VGA port) input.|
It does not have video outputs.
No TV does, that I know of.
You don't need to connect it as a monitor at all in order to record TV programs,if your computer has a TV tuner.
Do you have a TV tuner on the computer?
If you have only TV Out on your video adapter, that's an output, not an input, and you don't have a TV tuner.
You may be able to connect either TV Out to an input on the M237WA, or a VGA cable from a video port on the computer to the VGA input port on the M237WA. Connecting to the M237WA via a VGA cable will yield you a far better display on the M237WA.
If you DO have a TV tuner on the computer...
Many TV tuners come with software that can be set to record any TV program you want to your hard drive, if you connect a TV cable or TV antenna to the TV tuner. You can then display the recording on your computer display, or on your M237WA via it's D-sub input to a video output port on your graphics adapter on the computer, at any time you like.
NOTE that XP enables only one display by default. E.g. If you do have two video output ports on the video adapter on the computer (and both work), and you connect a VGA cable to the M237WA D-sub (VGA port) input, you must set the M237WA to a video input mode other than TV, e.g. PC, and you need to go to Display Properties in XP (e.g. RIGHT click on a blank part of your main desktop screen, select Properties)
click on the Settings tab, and RIGHT click on the second display and enable it.
XP will retain the enabled second display until the next time the computer is booted when the video cable to the M237WA has been disconnected.