Try stretching the data via the Image window and 'Enhance' and trying the stetches available. You may have to try a couple before you find one that works.

I am experiencing the same problem. The solution proposed doesn't work. I solved reclassifying in ArcGIS my rasters, dividing them in classes, but I lost the original values of cells! I am working with two raster clipped from another tiff. What's funny is that the source raster is loaded and displayed correctly, with the original values, while the two clipped aren't without reclassification. I am sure there's a way to visualize the original, but seems impossible to figure out, anyone can help me? thanks in advance! dario

I am having an exactly the same problem. It looks like no solution has been proposed so far...