If the screen is showing no signs of power at all then make sure it is plugged in properly. If it is plugged in and there is no sign of life RMA it. If there is power but no screen try swapping to another input such as VGA. If a port is faulty or you still cant get it to work RMA it. If you have another screen then try that also to make sure it is not a GPU problem. Make sure you have not bent any pins on the cable to the screen.