How do you hook up a tv to a computer?

It depnds on the television. Virtually all telelvisions will have external video inputs. You need to check the inputs on the television or in the manual. If you have a DVI or HDMI output from your computer, it may connect directly to the DVI or HDMI input. It's worth noting that the signals are compatible, so it you have a DVI output on the computer and an HDMI input on the television, a DVI to HDMI lead will work fine. If you only have a VGA output from the computer, you will need a VGA input to the television. The majority have them but not all. All LCD and plasma televisions have a native resolution - 1920 x 1080 is the common one but it might vary. For best results, always set the PC to the same resolution. A final point: Plasma screens, and to a lesser extent, LCD screens can both suffer from images being "burnt" onto the screen. Avoid using a static computer image for long periods of time to avoid this happening.