I have a 17 inch Likom CRT monitor. It's about 4-5 years old. When I turn it on sometimes it will come on with no problems then after about 10 minutes the whole screen becomes black and there's a bright wide line in the middle part of the screen. The "Power" light is still on. I've tried it on multiple CPUs and it still happens. Can someone give an explanation for the problem? The warranty has expired and I'm not sure if the part damaged will be worth the repair - should I just get a new one?