No signal to monitor

Ger291067 Posts 1 Registration date Sunday November 19, 2017 Status Member Last seen November 19, 2017 - Updated on Nov 20, 2017 at 01:44 PM
I have two PCs at home. Both are working fine except I can't get a video signal to the monitor. In summary-
When I turn the monitor on the Windows home screen displays for about 2 seconds before the screen goes dead. I have tried two different monitors (one HP and one LG Flatron) and two different VGA cables and various combinations thereof, and it still happens, AND it's happening with two different PCs, one Dell and one Compaq! I am completely stumped. Anyone any ideas as to what is going on?