No picture: No picture (Power LED not lit)

Screen shows: THIS IS 85HZ OVERDRIVE....: Input signal from your PC is 85Hz -- outside the range that the monitor can display.

My monitor shows the message: NO VIDEO INPUT. What can be the cause of this message?

Imaging problems: An after-image remains after the power has been turned off.

Get lost when you are making monitor adjustments.: Forgot previous monitor settings.

Screen shows: CANNOT DISPLAY THIS VIDEO MODE...?: Input signal from your computer is not in a standard video mode or is out of the monitor’s scanning range.