Yesterday my brand new Samsung 710T lcd monitor arived and for the first few hours i used it, it was flaweless. After a few hours a horizontal line developed across the screen sligthly above the middle. I am using the DVI, but the problem occurs with the analog connection as well. I have hooked the video card back up to my old monitor with no problems so im pretty sure it is the monitor. I have tried using the basic plug and play driver, and the Samsung driver and it still occurs. I have searched for this problem and have tried some of the suggestions like the dvi setting in my catalyst drivers for my 9800pro. Anyone have any ideas, thank you in advance.