If the current draw is 0mA or >400mA, or the flash tool reports NAND hardware failure, you need to repair the hardware.
Check Device Manager. You should see (usually COMxx). Step 3: Loading the Bootloader E8372h-153 Dead Boot Repair
If the web interface loads but the modem doesn't register on the network, you need to restore the IMEI and calibration data (which live in the nvme partition). Back up your nvme.bin from a working donor unit and write it using: If the current draw is 0mA or >400mA,