Hi. I have a monitor with 1600x900 (native) resolution, the current selected resolution. I've been using this monitor for about 3 months without any problem but suddenly i have black borders around the left and up side of the screen. Like i said it used to work fine but it suddenly has this issue. My graphic card is: Intel GMA 3100. I don't have an option to adjust the over/under-scan in my CCC (Catalyst Control Center). I would be much grateful if you can help.