Set Boot from USB to enabled in UEFI menu.Flashing should complete successfully, all commands should exit with 'Status: 0 The operation complete successfully'.
From an administrative command prompt, run the following commands:emmcdl - p COMxx - f prog_ufs_firehose_8998_ddr.elf - memoryname ufs - x rawprogram0.xmlemmcdl - p COMxx - f prog_ufs_firehose_8998_ddr.elf - memoryname ufs - x rawprogram1.xmlemmcdl - p COMxx - f prog_ufs_firehose_8998_ddr.elf - memoryname ufs - x rawprogram2.xmlemmcdl - p COMxx - f prog_ufs_firehose_8998_ddr.elf - memoryname ufs - x rawprogram3.xmlemmcdl - p COMxx - f prog_ufs_firehose_8998_ddr.elf - memoryname ufs - x rawprogram4.xmlemmcdl - p COMxx - f prog_ufs_firehose_8998_ddr.elf - memoryname ufs - x rawprogram5.xml.The device should enumerate as Qualcomm HS - USB QDLoader endpoint on a COM port Attach the device to host PC using a regular USB cable.There will be no indication that the device is on (dark display).Or enter EDL mode using UEFI menu at boot.Or use jumper # 6 in S4 on debug board to force device into EDL mode.Either device has to have an empty EMMC (out of box or JTAG wiped).Boot the device into Emergency Download mode (EDL).