If you are the original owner, contact Lenovo Support. Note that they generally require a motherboard replacement to "reset" a forgotten Supervisor Password, which is a paid service. Method 2: The CMOS Battery Trick (Limited Success)
Locate the small coin-cell battery (usually wrapped in yellow or black plastic) and unplug it from the motherboard.
Prevents access to the BIOS setup utility. If set, you can often boot into Windows but cannot change hardware settings. lenovo t470 bios password reset verified
Locate the EEPROM chip on the motherboard (often near the RAM slots or under the black plastic shielding). Identify pins 5 and 6.
Method 4: EEPROM Reprogramming (The "Verified" Pro Solution) If you are the original owner, contact Lenovo Support
Before attempting a reset, identify which password you are dealing with:
For the Supervisor Password, the T470 stores the hash on a specific EEPROM chip (often the or 24RF08 type). Advanced users can bypass the password by "shorting" the SDA and SCL pins on this chip at the exact moment the laptop boots. Prevents access to the BIOS setup utility
On older laptops, pulling the coin-cell (CMOS) battery would reset the BIOS. On the T470, this will typically only clear the and the Power-On Password . It will not clear the Supervisor Password. Steps: Power off the laptop and remove the external battery. Open the base cover and disconnect the internal battery.