pinka is correct. The resolution is set to high for the monitor. During boot-up tap the F8 key, then from the options offered, choose safe mode or VGA mode.
Go into your settings via, right click on the desktop, then setting, then advanced, and click on the adaptor tab, bring your resolution down to 60 or 75hz. Reboot the pc and your display should return to normal. Then depending on the type and size of the monitor, you can now adjust your settings again, but don't take them too high. j.
Have to say that your on the ball there John, the refresh rate is the odds on favourite. I had this problem once with 5 machines that users had been playing with, had to reset the reg...there are a lot of keys though...
Hi woodchip. If the settings are too high then the monitor will not display, as you know. But by starting in safe mode, windows will use it's own drivers with the settings you say. This will then give you a display so that you can access your graphics card and change the settings from there.
The dedicated graphics card, [Not being used while in safe mode] will still have the high "Out of range" settings. Once these are brought back down, you can then boot in normal mode. Regards. j.