Method 3: Shorting the EEPROM Chip (Advanced Hardware Bypass)
Contrary to popular belief, modern ThinkPads like the T470 do have universal "backdoor" passwords. However, if your laptop was part of a corporate fleet, the IT department may have set a master password or used Lenovo Patch or ThinkAdmin tools to manage BIOS settings remotely. Verified Steps: lenovo t470 bios password reset verified
Use a "patcher" tool (available in specialized forums like BadCaps or BIOS-Mods) to clean the TPM/Password section of the code. Write the "cleaned" file back to the chip. Method 5: Buying a Pre-Programmed BIOS Chip Method 3: Shorting the EEPROM Chip (Advanced Hardware
Wait 30 seconds, then press and hold the power button to drain residual energy. Write the "cleaned" file back to the chip
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.
Method 4: EEPROM Reprogramming (The "Verified" Pro Solution)