hi to all here im new so please forgive my stupidity if i get things wrong

i bought a cable with rgb which would allow me to use my tv as a monitor, does an rgb cable do the same function as yellow video cable, the rgb cable i bought was MENT to have yellow WHITE red phonos but instead it came with rgb, when i complained they said it did same function as yrb cable, but i CANT get it to work at all. and my computer wont reconize my tv as a second monitor.

my pc specs are
dual core 2.0
2gb ram
biostar T series Motherboard
dvd writer
win dvr 3

i hope you guys can help me please

ty

Doctorwho4life
What vid card ? ?hi sorry for that ,my video card is built in to the mother board its 512mb motherboard is biostar, t series
op system WINDOWS xp professonal,

my tv has red yellow white phon sockets, can i connect rgb to this, if so what color goes where

sorry for many questions, but i THINK i have been conned by the shop what sent me the wrong cablesYou need to check your MBoard information to see if the onboard video will support hooking up aTV as a monitor...they don't all work this way simply with a cable.the book says this," transmits analog video signals to computer monitor or any other display panel wequipped with d-sub vga input", the set up menu allows you to use dual monitos or tv as a monitor

cheers