Does the phone show up on the PC in it’s current state? If so, unlock the bootloader:
and then (after it disappears due to wiped data) spflash from that state and powered off. Phone should be bootlooping sans the iodé splash prior to spflash.
I’m guessing you have a locked bootloader and a partial installation indicated by the iodé splash hang. If you can’t get it to register on the PC then it needs to be replaced.