Pulled out a computer that was in storage. Connected the monitor to the vga connection (motherboard), but the screen is blank. I tried an old crt monitor and same thing with that one. When the lcd isn't connected, it says 'no signal'. When it is connected, the power led blinks as if it and/or the computer is in stand-by. I can hear the computer working properly through it's onboard mini speaker, windows loading et al. Any ideas? It's got a DVI connector off the video card, but I don't have a DVI-VGA adapter. Any ideas before I go buy one?