Houndog777

Hi, if you can't start your PC, how did you change the diplay settings?

First, with your computer OFF and unplugged from the mains, make sure everything is properly, tightly connected to the rear of your pc and to the monitor.
Next, press F8 repeatedly during startup to get into safe mode.
Now go to Control Panel and adjust your Power Settings. Restart.
If it restarts fine, but you still have graphics problems, do a Systen Restore to a time before the problems began.

We could offer better advice though, if you could tell us what type of PC and Monitor you have.
Manufacturer, Model and Number.

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