How can I get my samsung to play at 120hz?

My Samsung Series 7 750 reports it is playing at only 60hz but Best buy told us it is supposed to play at 120hz. So how do I get it to play that high?|||That is a 120 HZ TV. It is ALWAYS showing 120 Hz on the screen. What you see on the info display is what is coming in, and most of the time that will be 60 Hz. However, the set is converting that to 120 Hz for display. If you get a blu-ray player, you can set the output to 24 Hz. Then your TV will display 24 Hz on the info screen. The screen will be operating at 120 Hz, however. There is聽no need for a display to show you what the TV is showing, since that is always 120 Hz.|||doesn't matter, man, the hz number is the frames per second. normal tv is only at 30 fps, and video games usually only get up to about 60, so you really don't need the 120 hz, but if it's really bothering you you might want to take it back|||don't believe everything a salesman tells you, read the manual