I'm just getting acquainted with my MBP late 2009, Sno Lep, and have tried for a full week now to get an external display to power up via the miniport/adapter to VGA display(s). I believe I've tried every 'fix' anyone on the myriad forums suggested and still do not get a live screen. I wasn't yet able to get through a call to the nearest Apple store (50 miles away). I've pretty much shed the Windows OS mentality, but am stymied by the external display issue.
Both external displays work with other (Dell) computers. Everything seems okay with the Mac, I've tried every conceivable resolution setting, mirror/no mirror, etc. I suppose the new adapter could be defective but have no way to check that (as far as I know). Yes, I used an external keyboard and mouse also when trying to connect the display. Portability will be great when I need it in the field, but for now I prefer the comfort-style external keyboard since I've spent a few decades on ergo boards and the Mac keyboard is like tap-dancing on a pinhead.
Is there a way to check the integrity of the adapter? I'm no tech but up till now have always been able to diagnose and solve my own computer issues (including the dying motherboards on both Dells).
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