Have you tried to flash it with s9_fix_upgrade.tar.gz first before you flash it with other firmware? It might solve the issue.
But if it doesn't work you can try the april firmware just found it from here https://bitcointalksearch.org/topic/m.36124081
In your case, I am 99.9% sure that with the PicKit3 you bring back to life your card!
1: extract the HEX file from a functioning card
2: the reinjected into the card that does not work (FW 0X00)
Ps : the PicKit3, the cost is ~_ 25USD
I agree with this I found his thread from here https://bitcointalksearch.org/topic/repair-a-t9-after-a-bad-firmware-lost-chain-5032987 flashing the hashboard with working hex file might solve the issue.