Why is there no picture on my monitor even though the power LED is yellow/amber orflashing green?
Reboot your computer while holding the Ctrl key on your computer. If you see any picture during the boot procedure, please verify the settings of your video card (for Windows go to Control Panel and select Display).
Check that the video cable is not damaged, bent or that any of the pins in the connector are damaged (please be aware that some VGA connectors have one missing pin). If damaged, replace with a new cable.
Set the Contrast to maximum level (100) and Brightness to middle level (50) Video card could be defective (try the monitor with another computer)
Check that the cable is attached correctly to the computer.
Press any key on the keyboard to wake-up the computer from power saving mode.