Method 2: Professional Service Replacement (The "Safe" Method)
Connect the CH341A programmer to your second computer. Attach the SOP8 clip to the BIOS chip, ensuring pin 1 (marked with a red wire on the clip) matches the dot on the chip.
: Power on the laptop. It may beep and prompt for a password; enter any random character and press . Follow on-screen prompts to press the twice or similar keys to confirm the reset.
Use verified ThinkPad automated patcher tools available on reputable tech forums (like Badcaps or Notebook1S) to scrub the supervisor password string from your specific dump file. lenovo t470 bios password reset verified
Method 1: The "EEPROM Chip Programmer" Method (The Only 100% Verified Method for T470)
On older laptops, pulling the coin battery reset the BIOS. On the T470, doing this will only reset the system time, causing a "Date and Time Incorrect" error loop upon boot without clearing the password.
(from another PC). Open serial monitor at 115200 baud. It may beep and prompt for a password;
It is highly recommended to buy a new motherboard.
, a forgotten (the primary BIOS lock) is a permanent security feature. Lenovo's official policy states that there is no software reset or master password available; if forgotten, the system board must be replaced to regain full access. Verified Password Scenarios
Erase the chip via the software, then write the newly patched .bin file back onto the chip. Method 1: The "EEPROM Chip Programmer" Method (The
🛠️ Method 1: The Hardware EEPROM Short (The Verified DIY Method)
An external programmer (such as the inexpensive CH341A USB Programmer).
If the short-circuit method proves too difficult or fails due to precise timing requirements, the absolute most reliable technical solution is reading and patching the BIOS chip via an external hardware programmer. Tools Needed A cheap USB hardware programmer.
If you can tell me the your T470 is running or if you have access to the BIOS serial/hardware code from the boot screen, I can help you identify which patcher is most likely to work.