I dusted my desktop monitor a couple weeks ago and hit the display buttons on it. Now whenever I turn on the display it is black, and I have to keep on uplugginging the cord and cable repeatedly. Sometimes it works after a few times, sometimes I have to do it for about 20min. The buttons of the front are: LIGHTVIEW; MENU; CONTRASTS; BRIGHTNESS; AUTO/SELECT.
I have tried to press them but nothing happens. HELP!