The black screen happenwd to me a time or two, i think it had something to do with the having multiple launchers installed and none set to default. Since i set my favorite launcher to default, no problems.
Also i must say rooting and romming a phone is worth the risk. For one, the bloat is gone(imagine running with around 500M free), second the customization is crazy in depth.
If someone were to consider rooting and romming their maxx, i recommend DroidTheorys AXIOM B20 rom.