If you do not want to solder or use a clip, three commercial tools are verified to work via the SMBus (System Management Bus) without disassembly:
Always keep a physical record of your Supervisor Password in a safe place.
Starting with newer generations, Lenovo stores the Supervisor Password in a non-volatile, electrically erasable programmable read-only memory (EEPROM) chip or within the Embedded Controller (EC). This chip does not rely on power to retain data. Removing the CMOS battery or the main laptop battery will only reset the system clock, often resulting in a error or a Real-Time Clock Error , making the laptop completely unbootable until the password is entered. Method 1: The Standard Shorting Method (Hardware Hack)
Shut down the T470 completely. Disconnect the AC power adapter, remove the external battery, and disable the internal battery in the BIOS (if you still have temporary access) or manually unplug the internal battery connector from the motherboard.
Warning: This can permanently damage the laptop. Some advanced technicians attempt to "short" the SDA/SCL pins on the EEPROM chip while powering on the device to corrupt the password read. This requires advanced soldering skills, a schematic diagram of the T470 motherboard, and carries a high risk of bricking the device entirely. This is generally not recommended for lenovo t470 bios password reset verified
Use a specialized ThinkPad auto-patcher tool (widely available on reputable tech forums like Badcaps or ThinkPad subreddits) to clean the supervisor password from the dump file.
This is the most common verified method used by hardware technicians. It involves physically shorting two specific pins on the motherboard's security chip at the exact millisecond the system boots. Disclaimer & Risks
The methods listed here are for the ThinkPad T470 . Earlier ThinkPads (pre-2015) may be easier to reset, while newer models (T480+) may have more stringent protections.
While older Lenovo models (such as the T60 or T410) could sometimes generate master backdoor codes based on error codes, the T470 utilizes a more advanced cryptographic seed architecture. Be wary of scams offering instant code generation software for newer generation ThinkPads; manual hardware interaction or authorized service validation is almost always required. Summary of Options Success Rate Technical Skill Required Risk Level High ($150+) EEPROM Pin Shorting CH341A Programmer Flash Low (~$10) If you do not want to solder or
Run the binary dump file through a verified ThinkPad auto-patching tool. The script locates the cryptographic lines where the supervisor password check is processed and overwrites them with a "clear" command.
: Disconnecting the CMOS battery for a few minutes clears the volatile memory. This resets the system date, time, and basic hardware configurations.
If you actually know the password but want to remove it so you aren't prompted again, follow these steps:
Confirm and exit with . Note: This will NOT remove a supervisor password. 3. Advanced Verified Method: Hardware Patching (DIY) Removing the CMOS battery or the main laptop
You can remove it by entering the UEFI BIOS menu (F1 at startup), selecting Security > Password , entering the current password, and leaving the new password fields blank.
On the T470, the password is stored in a non-volatile chip. Removing the CMOS battery (the "coin" battery) will not reset the Supervisor Password; it will only reset the system date and time.
Verified Method 1: The Official Lenovo Motherboard Replacement
Python-based auto-patching scripts tailored for ThinkPad standard builds (e.g., Lenovo Autopatcher). Step-by-Step Breakdown
