A client of ours is having trouble with some raster tiles in ArcMap. They gave me a sample, and I was able to get it looking right with the following workflow:
All you have to do is go into each of your loaded raster images, right-click, Properties, Symbology tab. Under Stretch, change the drop-down to None, and unselect Apply Gamma Stretch. Then it should look normal.
They tried this, and got it to work on partial tiles, but not entire ones. Is there any better solution? Attached is a tile sample. I'm using ArcGIS 10.2.2 for Desktop.