External VGA monitors are not working only with my Macbook Pro 2012mid version
Hi all,
I have a macbook pro 13' 2012mid version, running the latest version of Mavericks, 10.9.2. If I connect my macbook to any extrernal VGA monitor (I have tried 4 different monitors), then the external display is detected in system preferences, but the monitor is showing only black screen (no signal). I am 100% sure, that my minidisplay port, the cable and the monitors are working properly, cause if I boot the same macbook from bootcamp win7 partition, then external monitors are working well.
I have also tried the same miniDP VGA with an older macbook pro (I think it is a model from year 2011, but also running Mavericks 10.9.2) on the same displays and the monitors are working fine. So the problem must be with in my OS X.
A have also tried some things, that I found on the net, like booting with the plugged in monitors in safe mode, reseting pram, I tried different settings for the external monitor in the system preferences (resolution, refresh rate...) but nothing helped. External monitor stayed recognized in system preferences, but with black screen and no signal.
Your post is incredibly hard to read, font is way to small.
If you used Boot Camp Assistant to create a partition to install Windows to you need a REAL Windows 7 or 8 install media and license key and you have to actually install Windows on your Mac. Boot camp is only for creating a partition to install Windows and starting the Windows install from REAL Windows install media.
That Windows install media has to be a DVD disc, if your Mac has a built in DVD drive (Apple does not allow Windows to be install any other way on Mac computers that originally come with a built in DVD drive), or from a USB stick with the actual Windows install files on it (Not an ISO of the Windows install files).
So the question is did you install Windows on your Mac? It doesn't look like it from the Option key boot and the list of available Boot Devices you posted.
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