Sometimes a PCI has VGA both on the motherboard and on a separate card and only one works. If that's the case, use the one that works, not the ons that doesn't.
If none work, replace the broken component (the video card or the motherboard).
So I got a pre-built pc a couple years ago as a gift. I put it away for awhile while I was in college, and now my monitor displays "no input" when connected to the pc via a vga cable. I have tested the monitor and cord using another pc and it worked fine l.
I have read online about this problem but each topic points me in a different direction and I don't want to break anything. I don't have a lot of info about the pc but if I can figure out how to get the information I would be happy to.
One last thing, while the computer does turn on with all lights and fans working, the only way to turn it off is holding the power button down a couple seconds, not sure if that's relevant. Thanks!