My 2012 MacAir 11" has just been to Apple as it kept shutting down and rebooting randomly - they replaced the LogicBoard and Power Board. I am running OSX 10.7.5 , same as before the repair work. But since the machine was returned my external monitor is blank. The Activity Monitor does not show the DisplayLink application as running. I've rebooted, disconnected and reconnected, uninstalled the DisplayLink software and reinstalled. But still no external monitor. My USB DVI adapter appears to be okay. And the second monitor attached to my Minidisplay port is also working fine.
DisplayLink worked perfectly before the hardware repairs.
Any ideas?
