fix brick

Hello guys My problem was also presented in the title , it is an EXPLOITED BY HAN , and yesterday I tried to add some touches to the system and the XMB i've changed the sound of the beginning and the logo successfully but I have added a file I do not remember what it was after that my PS3...

Hi, when my ps3 can brick ? and how to avoid brick in ps3 ? and how i can to fix it if my ps3 is bricked ? my ps3 is slim CECH-2004B