I was changing resolution and clicked on the wrong display option making my primary monitor into a secondary, disabling my display. Now I have no display. This is an Nvidia 640gt card. I do not have a secondary monitor. I do not have a dvi-d adaptor for the second port (first is dvi), so I can't just swap the cable. I pulled the card out and plugged back into integrated graphics but I can't use Nvidia settings to change it back as I get a message that no Nvidia card is installed (as I had to pull it out just to see my computer). I only get options for my onboard graphics, which are not a problem. How do I toggle the nvidia card back to the correct monitor slot if I can't even see anything when using the card so can not access the settings? I uninstalled all Nvidia files hoping to clear the settings, but did not work. If I have the card running, I wouldn't even know how to change the settings 'blind' as I can't see to even get past the login screen. How do I reset this to default?