Hi vapochilled,
nothing, no rainbow splash, just nothing.
The rainbow and all other console output is disabled.
RuneAudio is mainly a "headless" audio player.
You should see the Rune boot screen instead.
If not, maybe your monitor is not able to display the image, because it is optimized for a 7" tft.
Use your smartphone or tablet (if available) and check for the RuneAudio access point.
Or use a ethernet cable and try to connect from your PC (browser).
http://www.runeaudio.com/documentation/quick-start/quick-start-guide/#player-setup
Frank