OK here is the problem. I have a Pioneer 507 plasma, which is connected via a Sony 5200 amp to the EX75. When selecting the EX 75 via HDMI the Pioneer sometimes selects 1080i so I get no picture and sometimes selects 576p when I do get a picture. Playing around with the Panasonic if I go into Setup - Connection – HDMI Settings I can only change the last option as the first three options, which include HDMI Video Format, cannot be selected. The other two options, which I also can't select, are Aspect for 4:3 Video and Digital Audio Output. Anyone got any ideas why I can't change the options?