told us something about your system as the red message requests. Is it a laptop?? A desktop? et al?
How can a message appear on a monitor if the system is off?? Your system is in some sort of power Management mode. Can you get into the BIOS?? If so, disable all the power mgt options.
Whenever I start up the computer, the monitor shows "PC Entering Power Saving Mode." There is no POST screen, just that message. It even appears when the computer is off. Is there any idea of what this could be?