|By blank do you mean all white or all black ? |
The subject monitor should display normally while booting when connected by itself even if settings in Windows for it are incorrect and you don't get a display in Windows.
(if you don't get a display at all, you're plugging the monitor into a port that is not producing video)
If that's your case,.....
NOTE that I am assuming the monitor that is not displaying is NOT the built in display on a laptop.
I'm also assuming you don't have two (or more) monitor displays normally.
Remove any bootable CDs or DVDs from drives.
Press F8 repeatedly while booting, don't hold down the key, and when the boot choices menu appears, choose
Enable low resolution video.
Your computer will boot normally except that the display will be forced to use default VGA settings that all monitors support.
RIGHT click on a blank area of the main desktop screen, choose Properties - Personalize - Display Settings - Advanced Settings - Monitor - Properties - Driver - Update Driver - Browse my computer.... - Let me pick from a list... - Next - choose (click on it to highlight it) Generic PNP monitor if it's listed - Next
( if Generic PNP monitor is not listed, click on the small box beside Show compatible hardware to remove the checkmark - Standard monitor Types - choose Generic PNP monitor - Next)
(OR - if you have the CD that came with the monitor that has the specific drivers for the monitor, or a download that has the specific drivers for the model, click on Have disk lower right, Next, and go to where the drivers are - Windows is looking for an *.inf file. NOTE that if the monitor is LCD or Plasma, you should load the specific drivers if they are available, because you can choose settings in Generic PNP Monitor mode that can DAMAGE the monitor ! )
Close (or if you chose specific drivers, if there is a list of models, choose the correct one, etc. )
click on Close on the Driver window.
click on OK on the Monitor window.
click on OK on the Display Settings Window
close the Personalization window.
When you Restart or start the computer after that, the subject monitor should display fine in Windows.