Took the monitor along with my computer to a friend's house so we could LAN up and play some games... turned the monitor on and there was nothing on it but a white glow at the top.. and it kinda stretched down into a 2 inch wide vertical white line through the monitor, straight down the middle... and that's it, it doesn't work no more... any idea what to do? what could have happened? nothing happened to the monitor on the way, it was perfectly safe in the car... 