Help 30 Days Almost UP - Samsung 841, Black Crush?

My 30 days is almost up for returning the Samsung 841.


I have a Benq PE8700+ hooked up to the 841 via DVI cable.


I am new at this so to me, the picture looks awsome.


I need to figure out how to identify black crush. I recently ran the AVIA DVD and set the display per thier instructions.


I also just painted one of those GOO systems screen on the wall.


Any easy way to tell if BLACK CRUSH is visible?