How to unlock advanced menu in Lenovo bios

Tutorial on unlocking the bios advanced menu

1. Go into the bios and turn off the Intel AT Module and Security Chip, and set them both into disable.

2. First use the programmer to back up the 4M bios firmware. Be sure to back it up! You can leave two more servings.

3. Download the UEFITool tool and use UEFITool to open the bios file.

After opening, it will look like this in the picture

4. Click the search tool or Ctrl F to pop up the search box and search for 04320B483CC2E14ABB16A73FADDA475F.

The search result will be as follows. The offset position is 404h, which is the circled part in the picture.

5. Double-click to locate the specific module code, then right-click the PE32 image section as shown in the picture, click Extract body to export the selected module code, and name it whatever you want. .

#The entry point in the red circle in the picture should be at this position 43D0h for the same model.

Related recommendations: "FAQ"

6. After exporting the module, use WinHex or a similar tool to open the module code just exported.

7. Use WinHex to search for hexadecimal, that is, search for the code you just searched in UEFITool, 04320B483CC2E14ABB16A73FADDA475F, and the software will locate the specific location.

8. After confirming that it is completely consistent, replace this paragraph with 778B1D826D24964E8E103467D56AB1BA (according to the content modified in the bios patches modified by leokim, this part of the advanced menu should be hard-coded replacement)

Save the file after confirming that the replacement is correct

9. Return to the UEFITool just now. Compared with everyone who knows how to do it later, use UEFITool to make the changes. The later modules are replaced again.

Still in the same position, right-click Replace body to replace the file just modified with WinHex. Be sure to look at the correct position and don’t replace the wrong one.

10. After the replacement is completed, save the firmware, and a new bios file will be generated, and then finally flash it back with the programmer.

11. After the flashing, 5 beeps will appear when booting for the first time. Alarm, pause, and then 5 alarms. During this period, the screen is black. Then go into the bios and turn off the Intel AT Module and Security Chip. Set them to disable. Foreign experts say that after this operation, the alarm will not sound. . . But it doesn't work for me. A friend in a previous post said that it is enough to unplug the cmos battery and turn on the computer, then shut down and plug in the cmos battery. I have also tried it and it doesn't seem to work. There will be no alarm sound after restarting. Now it seems that this is the problem. I think Test friends can test to see if this happens too.

This is a solution I sent to foreign experts via email, you can take a look.

The advanced menu will appear.

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