I have a Powerbook G4 12" (2005) and want to use my flat screen TV as a large monitor to play back downloaded movies. This new TV has HDMI ports and I have connected it to the laptop with a Mini DVI to HDMI cable. (This used to work on the old TV using Mini DVI to AV cable but there are no spare AV ports on the new TV) Disappointingly though the laptop picture is not repeated on the new TV. Is there a trick I am missing here or will such an old Powerbook just not support HDMI? Any solutions gratefully received.