short to ground pp_ldo11

hi, so i am working on an iphone 6 that was water damaged around u1601 and was causing apple logo bootloop, i found at 3 caps were bad and removed them, the phone booted to main screen. the next day i went and looked at it again and it was dead. there is now a short to ground on pp_ldo11, i found it at c4002_rf but i removed it and the short is still present and apple logo bootloop is back. would anyone know what ic/smd would be at fault without removing every component on that line. i was thinking of running a couple of volts through c4002_rf to try but the power supply i bought was faulty and now waiting for a replacement. thanks in advance