Horribly dim display suddenly happened

I have only had this computer about 8 months now, and it has been very gently used (no falls, etc.)  This morning, all of a sudden the display is horribly dim - can hardly make out anything - and what makes it worse is that I have bad eyesight and needed it brighter from the beginning.   What on earth is going on, and what can I do about it?  (In "Display" the marker is all the way to the right, and it was not that way originally, but is improving nothing.)  Help!

Try resetting the SMC
Intel-based Macs: Resetting the System Management Controller (SMC)
This is the Mac Pro desktop forum. I requested your post be moved to the MacBook Pro laptop forum.

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