How to remove supervisor password in Lenovo? | Thinkpad password remove trick 100% free

Hello FIXER, Here is the bios password remove solution for Lenovo ECs that has been effective on many models. It only works if the password is stored in the EC.

Shorten the LPC Bus:Connect LAD0 to LAD3 to GND. Use dedicated ports to directly connect to the tracks.

Steps:

Consult the Diagrams: Always refer to the diagrams to understand the correct connections.

1. Power On: Turn on the system and wait until the logo appears or immediately after the backlight turns on.

2. Short Contact: Briefly short the connection for 1-2 seconds. If held for too long, errors such as the following may occur:

   1. Fan error
   2. Bad data
   3. Thermal sensor issues
   4. System powering off

3. Enter BIOS Setup: After the short contact, press F1 to enter the BIOS setup.

4. Clear Security: In the BIOS, set the password to blank and clear the security chip.

5. Restart: Restart the system using Ctrl + Alt + Del.

Testing: Test the system to verify that the BIOS password has been successfully cleared.

Warning:

Do not perform the short contact before the backlight has fully turned on or during the shutdown process. Failing to follow this procedure carefully could result in bricking the device or corrupting data.

 FIND "LAD"

LAD 0,3 CONVERT LPC_AD 0,3 OR ESPI 0,3

FIRST SHORT  LPC_AD1 /PIN 4 & CHECK

Important Notes:

1. Be cautious: Resistors may be missing along the path, which could affect your connections.
2. Cutting communication corrupts the data, preventing the EC from reading the stored password, allowing the system to continue.
3. Clean the data by rewriting after access.
4. Important: Don’t save with F10. Simply press Enter twice to clear the password.
5. If serial, UUID, or other system information becomes corrupted, you may be saving incorrect data, similar to the old SDA/SCL method.

Caution:

1. This method is delicate, and there is always a risk of bricking or failed attempts.
2. ITE and Nuvoton chips are easier to work with, while Mec16 chips are more delicate and may require multiple attempts.
3. Timing is crucial for success—ensure proper timing for the procedure.

Working IC Models:

Mec1633, Mec1653, Mec1663, IT8186VG, IT5261VG, NPCE68B, NPCE288/388, and others.

Important Note:

The Mec1503 does not work on many models as it no longer uses the LPC bus and has been replaced by eSPI.

Handle with care: This procedure carries risks, and improper execution could result in bricking. Precision and timing are essential for success.