Hi Folks... I replaced the Logic Board ($160) on my A1316 pre-Thunderbolt 27" LED Cinema Display with a "guaranteed brand new OEM board" (their words, not mine). I downloaded the EDID Reset Tool. However, when I run the tool, the "Reset EDID" button is grayed out (unclickable) and is asking me to "Connect LED Cinema Display to begin." I've tried unplugging / re-plugging / re-booting the display and CPU but no change. As a result, there is no brightness control, no USB, and no camera. Audio controls are working and the display is on without intermittent black-out issues (for now). Any suggestions on what to do to get the display working fully? Thanks, Paras.