My computer does not recognize second monitor
I have installed windows 7 on as econd partition all the drivers are discovered but the computer does not recognize my second monitor. this owrks fine on the mac and when i boot windows the image is mirrored on the second monitor while windows loads until i reach my desktop then the second monitor does black and the computer cannot recognize it.
I just rebuilt and it worked fine before. thanks
iMac (27-inch Mid 2010), OS X Mountain Lion (10.8)