Mosaic to New Raster Output is Blank and Output Values are 255 to 255

[AJSchriever]

I'm trying to mosaic 28 TIF SRTM tiles into a new raster dataset, but with every attempt I make most or all of the individual tiles in the output layer are blank. No errors come up during the process, which completes very quickly. Also, the pixel values for the entire range ends up being the same in the affected tiles (for example, 255 to 255).

[MichaelS]

Hi AJ, are you still having this issue?

Could post a screenshot of 1) Your input parameters of the Mosaic to new raster tool, and 2) The source properties of one of your input TIFs by right clicking the tile in the contents pane >Properties>Source