For a several reason,
1. The monitor doesn't support the desktop resolution that Windows provide.
2. The monitor doesn't support the refresh rate that Windows provide.
3. The graphic card settings appear to be unsupported by your monitor.
4. The monitor maybe unrecognized by Windows, and needs drivers installed.
Try booting Windows on the safe mode, tweak monitor settings on control panel, or desktop properties, try the lowest resolution (800x600), and refresh rate (60 Hertz).
System.dat, User.dat, System.da0, User.da0
It will be blank..nothing is saved to your moniter.
The Dell Optiplex 745 can be extremely useful when it's working properly. If your computer starts to boot Windows XP then stops you should try to clean boot it from Safe mode and then go from there.
blast
Windows may be blank on a computer after rebooting because of a faulty video driver. To troubleshoot, reinstall the video driver.
Not sure but... windows 98/95 registry is contained in the System.dat & User.dat I was able to find this one for sure... the windows 95 backups are called System.da0 & User.da0 CompTIA A+ Guide to Software Fourth Edition pg. 377
An LCD monitor can go blank for several reasons. They include a loose cable, a weak input signal, an issue with the video card or a driver needs to be updated.
Each time that you access files on a disk, the monitor blinks or goes blank for several seconds. What might be the source of the problem and possible solution?
A Windows features window may appear blank if the computer is taking a long time to load the page. This window may also appear blank if the computer is having a problem with a virus. The best thing to do would be to restore the computer to an earlier time and see if it fixes itself. Do not do a full system restore to factory, as this would cause a loss of files and necessary updates.
windows xp
go to your settings and click blank virus on the first page, then that will remove the black virus off windows 7 PC
sepsis