Hello

While I play Maple Story its start good but after few minutes the monitor turns off to black screen and then back on and I see the game and it some times change the screen resolution on my desktop to 800 by 600 and few minutes later the monitor going black and saying no signal or some times its restarting my computer.

may you please help me? ty

What OS? If vista, its probs your graphics driver as this can do that. Try reinstalling it, or finding the newest one for it

-Paul