I have a 27" iMac and an LG 47" 1080p HDTV. I just bought the Griffin Video Display Converter, which is certified by Apple to pass both video and audio from the mini display port on the late 2009 iMacs. It works perfectly in that regard but there is an issue.
Whenever somebody turns on the HDTV the iMac's screen flickers the color blue on and off, sometimes staying that way permanently. Permanently the color blue that is. The only way to get out of it is to turn the iMac off and then back on (restarting it).
I have the Mirror Displays checkbox checked in the Display Preferences. When I uncheck that box it treats the connected HDTV as an extension to the iMac display, whether the HDTV is on or off, which makes my cursor disappear off one side of the screen. This is why I leave mirroring on.
I've actually seen this problem with other adapters and even another iMac (a late 2006 one). Although usually in those other cases the screen would just flicker blue on and off for about a minute after turning on the connected HDTV. Only on rare occasions with the screen stay stuck on blue like it's doing now almost every time.
I'm assuming there must be some sort of solution for this or something I'm not doing right as this adapter is certified by Apple for these iMacs. Perhaps some sort of setting on the iMac or the TV itself? Any help would be greatly appreciated.
-PN
Whenever somebody turns on the HDTV the iMac's screen flickers the color blue on and off, sometimes staying that way permanently. Permanently the color blue that is. The only way to get out of it is to turn the iMac off and then back on (restarting it).
I have the Mirror Displays checkbox checked in the Display Preferences. When I uncheck that box it treats the connected HDTV as an extension to the iMac display, whether the HDTV is on or off, which makes my cursor disappear off one side of the screen. This is why I leave mirroring on.
I've actually seen this problem with other adapters and even another iMac (a late 2006 one). Although usually in those other cases the screen would just flicker blue on and off for about a minute after turning on the connected HDTV. Only on rare occasions with the screen stay stuck on blue like it's doing now almost every time.
I'm assuming there must be some sort of solution for this or something I'm not doing right as this adapter is certified by Apple for these iMacs. Perhaps some sort of setting on the iMac or the TV itself? Any help would be greatly appreciated.
-PN
