I just purchased a new Asus G series desktop. After setting it up as described, which included plugging into my Samsung monitor, I get no signal to my monitor. I've tried various cables, HDMI, etc. which all work with other devices/computers, and still the monitor says "check signal cable," as if it's getting nothing from the computer. This is a new out of the box pc and ASUS wants me to send it in to them for service. Anyone advise what might be wrong? Never had a problem like this out of the box with a new pc before. I know my monitor works and is in good shape. Its also only a couple years old and supports HD.