Download the latest BIOS from the HP Support Page . Use a tool like 7-Zip to extract the contents of the .exe file. Look for a large file (approx. 8,192 KB) often named with the ROM family SSID and a .rom or .bin extension.
The "bin file" is the raw binary data used by a hardware programmer (like the CH341A ) to flash the BIOS chip directly, bypassing the operating system entirely. hp pro 3500 series mt bios bin file better
For power users, you can create the best BIN file yourself using: Download the latest BIOS from the HP Support Page
HP Pro 3500 MT usually uses: