After I enter my password in my Mac mini, my screen turns black. I know it is there, ( i can hear the assistant), but I cannot see anything. i went to Genius and they said hold Control, Option, P, R on the re-boot to get back to factory settings...

I went to the Genius bar and they told me to Control, Option, P, R on a reboot to restore the settings, but with a wireless KeyBoard it does not work. I installed my standard PC keyboard, but am not sure what keys renase the display back to factory settings.

Hello Dominique,
Generally on a PC Keyboard...
Windows key = Command key on Mac
alt key = Option key on Mac
PRAM reset, CMD+Option+p+r...
http://docs.info.apple.com/article.html?artnum=2238
With PC KB... Windows+alt+p+r
But try holding the Shift key down at boot to get into Safe Mode, see if the Display settings need adjusting.

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