Last night, I noticed a small horizontal line running across the bottom of my Samsung SyncMaster 204B. It hadn't been there before. Now, it won't go away. It shows up in XP, Vista, the BIOS, and over the monitor's OSD. Here's a close-up of what I'm talking about: Notice it goes through all of the folders and icons. The lighter line at the very bottom is my start menu. What's going on? What can I do about it?