I have an 2.4 GHz Intel Core 2 Duo iMac and my mini dvi port is totally busted. I've troubleshooted all I can: 2 mini-dvi to hdmi cables, 1 mini-dvi to vga cable, 2 separate hdmi cables, hooked up to a samsung and an lg monitor/tv -- all of which work fine when using my black MacBook. On the iMac, the screen turns blue for a second then back to normal desktop. The monitors/tvs show "no signal" So anybody else have this issue? Please help.