How can you use your television set as computer monitor?

You should be able to purchase an adapter at your local Radio Shack or equal. The problem you will run into is the pixels(amount of dots per inch)in a computer monitor are double that of a TV. Due to this fact, the text will appear fuzzy.OK for games though. Good luck.

get a device called a "scan converter"

if you have a video cards with video out it should be easy to hook up. check your card and manual.

my travel desktop has a geforce 2mx 400 it will do duel display in Windows but wont display on boot unless i have no monitor connected to the vga it then detects no vga and switchs over to TV out. your exp my vary.

Look at your electronics store for a 'TV-out' card. This will probably be a PCI card which you will need to install inside in your computer. You can then hook up your TV's cable to the back of the card.