On certain games my son trys to play on his computer he get's the message "signal over range" and the game will not play. The computer has a 3.3 ghz processor, 512mb ram and a 256mb g-force 6200 graphics card. Could anyone please help.
You can't get a screenshot of a "Signal over/out of range" message, since its being displayed from the actual monitor. This can usually happen when the computer crashes from overheating, check the temperatures with some software tools (can't think of any at the moment, try google) and make sure nothing's over 55c during heavy load.
The nvidia cards have a tempature reading feature that comes with the card on a disc, or at least my 6200 and 7900gs did. You should be able to just right click on your desktop and go to nvidia control panel and the temp. gauge should be in there somewhere.