PW2 pw2 Repair Needed help please!

i just wanna change font. so, i jailbroke and installed KUAL, python package and fonts pack. and, i changed font but, i didn't like it, so, i was trying change another font. but, it doesn't work. so, i removed former font (Times New Roman). and, i restarted kindle. it booted done, but, didin't displayed main library, just displayed tab menu(?) and stopped and next restarted. now i can see just this repair notice:
Repair Code:2
Version:2155730032
DSN:905**********3DP

sorry, i am not good at english
HELP PLEASE!!:help::help::help: