Model..PDP4200EU Having trouble getting my Satellite and my PS3 to work on the TV. Getting No Signal/Picture/Sound from the SCART or the AV connections. I have also locked the OSD Menu, so each time I try to access the menu, I get the message 'OSD LOCKED!' on the screen. How do I unlock this??? I presume once I can get into the menu I should be able to get my satellite and PS3 connected to the TV. HELP!!