I noticed this problem with the DG41TY motherboard. I don't know if others too have noticed this or not. Just want to confirm.
I changed the memory frequency of the 2GB RAM in the BIOS setup under Advanced -> Memomry/Chipset configuration. I use a Kingston DDR2 RAM with an 800 mentioned in the model number.
The moment I changed the frequency to 800 MHz from 667 MHz and restarted the computer, I saw a dotted like across the screen in the lower half of the monitor. I rebooted and reset the frequency back to 667 MHz. The line disappeared. Is there a problem with the DG41TY motherboard or is there something I should know about before I use this 800 MHz frequency?