I took out the 2032 CMOS battery and waited 5 minutes...Got same message when restarted. (I reinstalled battery, connected power)
I removed four memory cards one by one, reinstalled and started system. Through the the first 3 cards I got message that VGA input was now "active" but only got a blinking cursor at left top of screen. Upon removing a fourth memory card and re-installing it, got original message that there was no VGA input signal (back to square one). I am not familiar with taking out PCI cards (not done). Still not fixed.
OK..removed cmos battery for 5 minutes again. Made sure all memory was secure in its settings. Fired back up...message says VGA is active and blinking cursor in left top corner is visible but still not regular screens, However, for first time can activate monitor buttons for "menu", "source", and "auto". One other message said monitor was making an auto adjustment.
Back to bad square one...now get original message of no vga input signal. I checked the hard drive and connection seems tight. Seems to me we got improvement each time we took out the battery for 5 minutes. Do we need a new 2032 battery?
Thanks for your input. You appear to have narrowed it down to a specific cause. I am not qualified to install a video card so I now intend to take the computer to a local repair shop to do the work.
I would like to now end this session. Your help was appreciated and I accept the $38 charge.