Today I have rebooted my computer because some programs get freeze and I had to forcefully reboot the system by using the restart button on the CPU case. When the system boots up, nothing showed on the screen. The monitor light was blinking as well as the CPU LED. I can hear fans running. Then I pressed the button on the monitor and it shown me a message” in power save mode. Press any key on keyboard or move mouse." I did try that but still it is showing blank screen. I have disconnected the wire from the computer and monitor shows a dell icon box with colors floating around the screen. If I connect the monitor to the motherboard, it is completely blank. I have even tried with the different monitor and still the same case.