This is stored in a dedicated security chip (EEPROM). It cannot be cleared by removing the CMOS battery.
Before attempting a reset, you must identify which password prompt you are facing. The T470 utilizes three distinct hardware-level passwords:
: This is the most reliable method cited by the community. It involves using a CH341A USB Programmer to read the BIOS chip's data. The Process
: Finally, the original, unmodified BIOS file is flashed back to the chip to restore full system stability and serial number integrity. Summary Table: Reset Methods Effectiveness Risk Level Requirement CMOS Battery Removal Does not work on T470. Master Password Gen Rarely works for newer supervisor passwords. Hardware Patching Requires CH341A programmer and steady hands. Motherboard Swap Most expensive option. parts list for the hardware programmer required for this process? ThinkPad T470s UEFI Unlock - GitHub
: Because the password is baked into the hardware chip, a brand-new motherboard comes with an unprogrammed, open EEPROM. lenovo t470 bios password reset verified
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Lenovo’s official stance is clear: if you lose a , they cannot reset it. There are no "backdoor" passwords or factory master codes.
Practical recommendation
The auto-patcher method requires disassembling the laptop, handling a hardware programmer, and using command-line or third-party software. It is not recommended for users without some technical background. However, numerous beginners have successfully used this method by carefully following video guides and forum instructions. This is stored in a dedicated security chip (EEPROM)
Reassemble the laptop partially, turn it on, and immediately enter the BIOS. The password prompt will be gone, or it will accept a blank entry. Press F9 to load setup defaults and F10 to save.
When hardware programming seems too daunting or when repeated attempts have failed, professional unlocking services offer a reliable alternative. Several authorized and third-party providers specialize in Lenovo ThinkPad password recovery.
: Reassemble the laptop partially, plug it in, and boot it up. Press F1 to enter the BIOS. If prompted for a password, hit Enter (blank). Navigate to the security tab and set a new password, or leave it blank to clear it permanently.
⚠️ The methods described below involve opening your laptop, handling sensitive electronics, and potentially using hardware programmers. Mistakes can permanently damage your T470. Consider the following: The T470 utilizes three distinct hardware-level passwords: :
Summary
On older desktop computers, removing the CMOS battery for a few minutes would clear stored settings and passwords. This no longer works on modern business-class laptops like the T470. On these systems, removing the CMOS battery primarily resets the clock and basic settings but does not remove the BIOS password. The password information is stored in non-volatile memory or within the embedded controller (EC) firmware, which retains its contents even when the system is completely powered down. One user who attempted this on a T470 confirmed that removing the CMOS battery and main SSD allowed access to the boot menu but did not clear the password.
: Lenovo Support cannot reset a Supervisor Password. Their only official solution is a complete motherboard replacement
Removing the coin-cell battery will only reset the system clock. It will not clear the Supervisor Password.