I have a ~2009 MacBook Pro (model
OS X 10.6.8.
I'm trying to use a
Apple Mini DisplayPort to VGA adapter to connect to an external monitor. I've tried two different monitors and two different VGA cables so far, and no luck. Both work fine with my ThinkPad; simply plug and (dis)play.
I believe I've already tried every permutation of the order of connecting things, as well as with power on or off. But the MBP just doesn't seem to recognize the monitors.
For example with monitor powered on, when I insert the DisplayPort adapter, the MBP screen turns blue for a second or two ... but then I don't see anything on the monitor or anything change in
System Preferences > Display.
I've never tried to connect an external monitor to a MBP before -- I didn't expect it to be this difficult. Is there something dumb/obvious I'm overlooking??
EDIT: Showing System Profiler result for
Graphics/Displays when the external monitor is connected but not recognized via the mDP. Note that it shows two adapters:
NVIDIA GeForce 9400M: Chipset Model: NVIDIA GeForce 9400M Type: GPU Bus: PCI VRAM (Total): 256 MB Vendor: NVIDIA (0x10de) Device ID: 0x0863 Revision ID: 0x00b1 ROM Revision: 3448 gMux Version: 1.8.8 Displays: Color LCD: Resolution: 1440 x 900 Pixel Depth: 32-Bit Color (ARGB8888) Main Display: Yes Mirror: Off Online: Yes Built-In: Yes Display Connector: Status: No Display Connected
NVIDIA GeForce 9600M GT: Chipset Model: NVIDIA GeForce 9600M GT Type: GPU Bus: PCIe PCIe Lane Width: x16 VRAM (Total): 256 MB Vendor: NVIDIA (0x10de) Device ID: 0x0647 Revision ID: 0x00a1 ROM Revision: 3448 gMux Version: 1.8.8 Displays: Display Connector: Status: No Display Connected Display Connector: Status: No Display Connected