CamStapleton: Getting sound but black screen on startup. I can Alt-Tab out and get a tiny window with video but can't change this to fullscreen.
Win7, Nvidia560ti and Xonar sound card.
To go from Window to Full screen in DOS Box, you press Alt+Enter.
You can change open the .conf to configure the DOS Box graphics. In this case, the file is "dosboxC5.conf".
I recommend setting
fullresolution=desktop
output=overlay
aspect=true
scaler=normal3x
I do this for all DOS games.
I don't know why you get black screen. It might have something to do with the "output" variable, or the default fullresolution(=original) is not supported by your monitor.
"fullresolution=original" means 320x200 pixels in the case of Challenge of the Five Realms. Most if not all modern LCD monitors cannot handle such a low resolution, including my monitor. Even if they can output such a low resolution, they do it very poorly, because they are designed for a particular resolution (the native resolution), and the further you get from this resolution, the more the image degrades. I don't know why GOG keeps using "fullresolution=original" because it is just a lot of problems. It is better to use the settings I listed above.