The most reliable way to obtain a working BIOS file for an HP ProBook 640 G2 hp probook 640 g2 bios bin file best

• Click Erase (full chip, not just sectors).
• Load your best hp_640G2_clean.BIN.
• Click Program.
• Verify (the software reads back and compares).

• Main Board Number: usually DAX61CMB6A0 or DAX61CMB6A1 (Rev D)
• Chipset: Intel Kaby Lake (7th Gen) vs Sky Lake (6th Gen)
• BIOS Chip: Winbond 25Q64FVSIG (8MB) or 25Q128 (16MB)