My early 2008 white Macbook running Lion will not detect external displays. I've reset the PRAM and the SMC both to no avail. What I have running right now is a Mini-DVI - DVI cord which is connected to a DVI - HDMI cable and then plugged into my 32" LG LCD TV. Also tried it on my 55" SONY LCD TV, didn't work. I'll plug it in to my Macbook and the screen will flash a light blue, and then be at maximum brightness. I'll click detect displays and nothing happens. I have reset my computer, shut down the computer, put it to sleep etc. Does anyone have any idea as to what I can do to make it work?