mobile

Hi guys, I have my Galaxy Grand SM-G7102 boot loop. It can no longer access the Recovery Mode, when I go to that it says "mmc_read fail". Download mode works fine, but when I flash stock rom via Odin, it looks for a PIT file, and when I added a PIT file, it still errors. Please help me with this one. I have tried putting the usb chord into different usb hubs and used 2 different usb chords. The flash is always error.