I Bought a refurbished Sony 24 inch 3d playstation display. It is model # CECH-ZED 1 U. Unit works perfectly.I just want to obtain a users manual for the unit. I am using it with my PC VIA an HDMI connection. With no users manual I cannot even tell what the buttons on the back do, except the on that turns it on and off.Sony is of no help as are several other places I have tried. Any suggestions?? Thanks