If you tell me your exact (Tower/SFF), board revision number , and current BIOS version (if known), I can help locate the most reliable known-good dump source.
Only hunt for a Z230 .bin if you have an external programmer and a backup of your original. Otherwise, use HP’s recovery tool or replace the motherboard. hp z230 bios bin
It sounds like you're looking for a for the HP Z230 Tower / SFF workstation, likely to flash a corrupted BIOS or replace the chip. If you tell me your exact (Tower/SFF), board