@dstoneham Do you have a screen with CCFL or LED backlight. If CCFL you could try to replace with a LED strip and see how that works. You can those very cheap already. I did that with an old 17" LCD which had 4 CCFL tubes. Now it has 2 LED strips instead and the brightness increased.
MMM-DarkSkyForecast iconset, does not change when I change the iconset value in config , any ideas what I am doing wrong, also changed the default but still nothing seems to be only showing 3c