T999 Hardbricked ! topic

hello I try to flash my T999 after reboot it does not want to turn on , no combination works , when I plug it to the PC it told me I was unknown device , i take to repair they saying that it will repair with gpgemmc but after he told me that its not going he told me that it my be the EMMC is dead or my micro usb connector is not good and it prevents the gpgemmc pass the flash boot
does the micro usb connector is necessery for the gpgemmc or the jtag i dont think !