Water Damaged, now no image on screen

im a tech at a phone repair store. and a customer brought in a note 3 that had no power from water damage. i ultrasonic cleaned and found a bad coil (it literally left its pads soldered to the board but the coil itself fell off) replaced the coiland now i got the phone booting,but it displays no image on the screen. i know my test lcd is working because i hooked it to another note 3 and displays image just fine. i checked all the data chokes next to the fpc connector for the lcd.and the fpc connector itself all test good