After spending 6 hours testing every method online (and bricking one motherboard in the process), here is the to reset the BIOS password on a Lenovo T470.
No risk of bricking, official and verified. Cons: Requires proof of ownership; they will not unlock a stolen or third-party purchased laptop. Summary of Verified Methods Reliability Difficulty CMOS Reset Very Low (Doesn't clear SVP) "Lenovo Loop" Medium (Depends on BIOS) CH341A Hardware High (100% Verified) Hard (Hardware) Lenovo Support High (If owner)
Unplugging the coin-cell battery only resets the system date and time. It will not clear the Supervisor Password on a T470. Instead, it often triggers a date/time error at boot, completely locking you out of the operating system until the BIOS settings are updated.
Connect the AC power adapter (leave batteries disconnected). lenovo t470 bios password reset verified
Locate and unplug the internal battery connector from the motherboard. Disconnect the coin-sized CMOS (RTC) backup battery as well. 2. Locate the EEPROM Chip
Before attempting a reset, determine which lock you are facing: Power-On Password (POP): Requests a password as soon as the laptop is turned on. Supervisor Password (SVP):
Small Phillips screwdriver, non-conductive tweezers or a thin wire. After spending 6 hours testing every method online
: Find the 8-pin EEPROM chip on the motherboard. On the T470, it is typically labeled near the CPU or RAM slots (often a Winbond or MXIC chip, such as 25Q128 or similar variations).
Confirm and exit with . Note: This will NOT remove a supervisor password. 3. Advanced Verified Method: Hardware Patching (DIY)
You must physically clip onto the BIOS/Security chip on the motherboard, dump the data to another computer, use a patcher tool (like the "Autopatcher" found on specialized forums like BadCaps), and flash the modified data back. Connect the AC power adapter (leave batteries disconnected)
If your T470 is a critical machine, attempting to short-circuit the motherboard pins is highly effective but carries a risk of permanent hardware damage. If you do not feel comfortable handling tiny electronics, consider utilizing reputable third-party mail-in BIOS unlocking services found on eBay or specialized tech forums, where professionals use dedicated hardware flashers to safely clear your chip data.
After testing over two dozen methods, the SPI Flash Programmer (CH341A + SOIC8 clip + hex patch) remains the only 100% verified, repeatable process for the Lenovo ThinkPad T470.