Occasionally a sightly grey and blurry vertical line appears near the left center of my screen and sometimes when I play games, like League of Legends, my resolution tears and it seems like the resolution keeps resizing. I think this may be a problem with either my Nvidia GeForce GTX 470 graphics card or my old Dell CRT monitor. I've tried refitting the card in my motherboard, cleaning the card of dust, replacing the vga connector, made sure all connections were secure, reverting to old drivers, and updating to new drivers but nothing seems to get rid of this problem. I'm afraid either my card or my old monitor has gone bad.