Examine the motherboard of the ProBook 640 G2. Look for an 8-pin SOIC chip, usually manufactured by Winbond, Macronix, or Gigadevice (e.g., Winbond 25Q128FV). It is typically located near the CPU heatsink or the RAM slots. Step 3: Connect the CH341A Programmer
Before you even think about using a programmer and a fixed .bin file, you must attempt HP's built-in recovery procedure. This official process is the first line of defense and is much simpler and safer.
Once the laptop successfully boots, you might see a warning stating "Manufacture Programming Mode is in Unlock Mode" or missing serial numbers. To restore your original machine identity:
16MB (128M-bit) or 8MB (64M-bit) depending on the exact motherboard revision (e.g., Circinus-6050A2723701-MB-A02). ME Region: Intel Management Engine (ME) 11.x. Symptoms of a Corrupted HP ProBook 640 G2 BIOS hp probook 640 g2 bios bin file fixed
Read the chip contents and click . Save at least two separate copies as a backup. 3. Flash the Fixed .bin File
Risks of using unofficial or modified BIN files
A working .bin file must match your motherboard revision. When downloading a verified file from reputable developer repositories, ensure the Intel ME region is "Cleaned" or "Initialized." Examine the motherboard of the ProBook 640 G2
Newer HP business laptops like the ProBook 640 G2 often include a feature called . This is a self-healing BIOS protection mechanism that runs on a separate chip on the motherboard. If the Sure Start chip detects that the main system BIOS has become corrupted or has been attacked, it will automatically restore the BIOS to a previously known good state without any user intervention. If you see a message stating that "BIOS corruption has been detected," you might not need to find a BIN file at all, as the system may fix itself upon restart.
Connect the AC adapter. The laptop may automatically turn on, cycle its power 2 to 3 times, and display a blank screen for up to a minute. This is normal behavior while the system initializes the clean Management Engine and builds new system tables.
Summary
: A common "fix" is to use a BIN file from a donor machine to bypass forgotten BIOS administrator passwords.
Before resorting to a programmer, you can try HP's built-in emergency recovery: Download the latest BIOS from the HP Support site. Run the file and select "Create Recovery USB flash drive." Plug this USB into the broken laptop. Press and hold Windows + B while pressing the Power button. Where to Find "Fixed" BIOS Files