wodashie its not problem of emmc if ur all screen is white wid red and black lines dont worry download mg4 firmware (I9300XXEMG4) and mx.pit file and flash with odin ur screen problem is solved after dat next step u have to repair efs with octopus box nd root ur mobile and repair imei nd ur ph is ready i fix 10 mobiles same problem and one thing after repair efs if ur basband is null u have to change emmc chip best of luck ....and post result here