no backlight after touch ic repair

hello people,

im new in the iphone repair. yesterday i replaced te meson ic. i ruined the trailerpark so it took a little while (and a long time of heat) to put them back. when i was finished i started up the phone. the backlight dident work. when i start it up i see the apple logo with stripes on the screen for a few seconds and then only the black light. around the connecters it gets really hot. especialy near the backlight circuit. i already replaced the backlight filter but it doesnt seem to make a difference. can anyone give me some advise? i hope someone will recognize the symtomes.