Gotta say...it depends really on what kinda TV you have. For example, if you have a plasma or LCD Television, which accepts VGA of DVI input (the cables used for displays), then you could consider hooking you PC to it, because of the high image quality you'd experience.
However, if you have a CRT Television, then using it as a display for your PC would not be a good idea, because the lack of image sharpness, resolution and sharpness. Plus, with CRT Televisions, there's only the option of using an S-VIDEO or COMPOSITE cable to transmit video signals, which compared to DVI or VGA, aren't as good.
Instead if you have a CRT Television, consider buying a TV Tuner card for your PC, so you can watch TV, videos, cable, satellite or DVDs on your PC, using your 19" Monitor as your display. However, this means that the TV display window would take up desktop space. Also, although digital signals like on satelite, DVD players or cable would show up clearly on your 19" Monitor, analogue signals like from VHS videos and ariel television would appear slightly fuzzy, because of the high resolution the PC has in comparison to a CRT Television.
So long as you have a CRT Television, it's best not to use it as a PC Display .
|Desktop PC| |Macbook Air 13" (Mid 2013)|
|Windows 8.1 Pro (x64)| |AMD FX 4100 Black Edition 3.6 GHz @ 4.0 GHz OC| |Arctic Cooling Freezer 13 PRO| |Gigabyte Nvidia GeForce GTX 560 Super Overclock 1GB| |ASUS M5A78L-M/USB3 Motherboard| |Samsung 840 Pro 256GB SSD SATA III HDD| |Kingston HyperX 8GB PC3-14900 DDR3-1866| |OCZ ModXStream Pro 700W Modular PSU| |NZXT Vulcan Micro ATX Case|