After flashing a "fixed" bin file, your laptop might show a "System Information Missing" error on boot. This is because the new file doesn't know your specific Serial Number or Feature Byte. You can fix this using the or the HP DMI Tool to re-enter the data found on the sticker under your battery or on the base cover. Where to Find Reliable Files
Before performing any advanced fix, it is important to confirm that the issue is BIOS-related and not another hardware failure. For the ProBook 640 G2, a corrupted BIOS often presents specific symptoms: the device powers on to a completely black screen with no display output, the cooling fan may spin up to maximum speed, and the CAPS LOCK and NUM LOCK lights might flash a specific pattern to indicate a BIOS corruption error. Additionally, you might see the HP logo flash briefly before the system reboots repeatedly, which is a telltale sign of a failed or incomplete BIOS update.
: Look for a file with a .bin extension. For this model, the file name often corresponds to the System Board ID (e.g., 08101.bin ). 2. Fixing Corruption (Manual Repair)
Attach the SOIC8 test clip to the chip, ensuring (indicated by a small dot on the chip) aligns with Pin 1 on the programmer. hp probook 640 g2 bios bin file fixed
Note the small indentation or dot on one corner of the chip. This indicates . Step 2: Read and Backup the Corrupted BIOS
The HP ProBook 640 G2 operates on the Intel Skylake architecture (6th Generation Core processors). Understanding the layout of the motherboard (system board) is essential before attempting any physical hardware interventions.
Search for unique text strings such as the laptop's serial number (e.g., "5CG...") in the corrupt file. After flashing a "fixed" bin file, your laptop
Crucial: Once writing finishes, click . The software will compare the data on the chip byte-by-byte against your file. If verification fails, adjust your clip alignment and try again. Post-Flashing and First Boot Disconnect the programmer and clip from the motherboard.
Open and click Detect . The software should automatically identify your chip model (e.g., W25Q128).
Tools like HxD to view and verify the structure of the binary files. Where to Find Reliable Files Before performing any
Open your corrupted_backup.bin file in the HxD hex editor. Search for text strings containing your laptop’s serial number. Copy this entire data block (known as the DMI block). Open your clean, fixed .bin file, navigate to the matching offsets, and paste your original DMI data over it. This ensures your laptop retains its legal Windows license and serial numbers. Step 4: Erase and Write the New Firmware
Click "Write." After the process finishes, always run a "Verify" check to ensure the data on the chip matches the file perfectly.
When you first press the power button, the laptop may power cycle two or three times while the new Intel ME region initializes. This behavior is completely normal. Once the screen turns on, repeatedly tap F10 to enter the BIOS menu and verify that your system information displays correctly.
Connect the SOP8 clip to the chip, ensuring (marked with a small dot on the chip) aligns with the red wire on the programmer cable.