s6 edge g925t water damaged no display only white light on

got a g925t with little water damage from usb board, main board cannot find any damage everything is clean and shiny.

if i plug in usb it can charge according to my reading at the battery, but no display

if i hold power button for 10s it’s the notice led shows yellow then turn into white (or all color on), no display

if i plug in the usb jig no led on, no display, but main mcu becomes warm.

is it a emmc issue? looks mcu boot up but cannot load the code….

could any prived some documents?