Really dumb question:
Did you charge it yet? Just cutting out sounds like what a low/dead battery does.
A couple more questions:
Did you follow all of the instructions for editing the SD card, especially the process for adding to SaberTracks, in the
Spark Color 2 manual?
Are you using the
Spark Color Config Editor to edit the motion/color settings, or are you manually editing the text files?
If it's not the battery, my guess is that you did something you shouldn't have and your files are corrupted, or you have the wrong value in there somewhere for something if you were manually editing the .ini files. If you didn't backup your SD card before changing things (which you should
always do), you can find a set of
Default Files here, though they may not be the same as you got from SF (my Hero had an older set with couple different fonts). Just follow the instructions in the manual for replacing files (backup, format card, copy over one folder at a time) and you should be good to go. If the problem persists after replacing the files with new defaults, then it's probably a hardware issue.