When brightness is decreased lower than 64 (it goes normaly from 100 to 0) all the black parts of the image turns red. When I reach 0 level for brightness the whole screen is red. This happens for any video input (SCART, S-VHS, TV, RCA). Also, when 4:3 aspect ratio is selected, the two side bands which suposed to be black, are red. When OSD menu is displayed, the background is also red instead of black. HELP!