coombrh :
I have a Lenovo laptop that I purchased with Windows 8. I recently upgraded to 8.1 and now the function key to adjust brightness does not affect brightness. I went into the power settings and made sure the slider on the brightness level was at its highest level. Cannot seem to figure out why my screen is so dark
. . . . Have you tried turning it off, then turning it back on?
Sorry, that really is the first thing that comes to mind.
If the answer is "Yes, I have, smartass, but the problem isn't gone", then it sounds like the display driver somehow got corrupted. This might be a long shot (that too in the dark) but do you use TeamViewer, and if so, did you recently try installing its monitor driver?
- Nick