LG Screen blank suddenly

Hello,
I have a LG flatron L1715s screen, while i was playing on it using an xbox, the screen suddenly went black. When i try unplugging it from the VGA slot or the Power slot and replugging i get the screen working and see the desktop ( i tried it on my pc too) for less than a second, then it goes dark again. So in total, the screen went black suddenly and wont work on anything i plug it into.
THanks