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imac brightness control is stuck at half

196 Views 2 Replies Latest reply: Jan 19, 2013 9:54 AM by WZZZ RSS
Crontab31415 Calculating status...
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Jan 19, 2013 9:51 AM

The brightness control on my brand new iMac 27" appears to be "stuck" at half-way.  The display is not very bright and I'd like to increase it, but when I press the F2 brightness key, it will go down, but not up past half-way.  Is this a retina display thing or indicative of some problem.  It does appear dark and I'd like to brighten it up some. 

iMac (27-inch, Late 2012), OS X Mountain Lion (10.8.2)

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