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Lenovo Thinkcentre M720q Bios Password Reset May 2026

Forgetting or losing a BIOS password on a Lenovo ThinkCentre M720q Tiny can lock you out of critical system settings, such as boot order or hardware configuration. Fortunately, you can reset this password using a physical hardware jumper on the motherboard. 1. Locate the CMOS/Recovery Jumper The first step is to access the internal hardware.

Shut Down & Unplug: Power off the computer and disconnect the AC adapter and all other cables.

Open the Case: Remove the single screw at the back of the chassis and slide the top cover forward to remove it.

Find Jumper JP35: Hold the unit so the rear ports are at the top. The Clear CMOS/Recovery jumper is typically a 6-pin block located in the upper-left corner of the motherboard, often near the Wi-Fi antenna or M.2 slot.

Note Default Position: In its standard operating state, the jumper is usually on pins 5 and 6. 2. Move Jumper to Maintenance Mode

Moving the jumper tells the system to clear stored security settings.

Reposition Jumper: Carefully move the jumper from the standard pins (5-6) to the maintenance position (pins 2 and 4).

Critical Tip: Some users report that removing the RAM from the bottom side of the unit during this process is necessary for a successful reset. 3. Clear the Password

Power On: Reconnect the power cable and press the power button. The screen may remain black, but the internal speaker should begin to emit a series of double beeps or a short melody.

Wait for Beeps: Allow the computer to beep for several cycles (roughly 30–60 seconds) to ensure the CMOS has been cleared.

Power Off: Press and hold the power button to shut the system down, then disconnect the AC adapter again. 4. Restore Standard Configuration How do you remove admin password from bios Lenovo m700 tiny

To reset the BIOS password on a Lenovo ThinkCentre M720q , the most effective method involves using the physical Clear CMOS jumper (labeled as SW_CLR_CMOS ) on the motherboard

. Simply removing the CMOS battery is often insufficient for modern ThinkCentre models as passwords are frequently stored in non-volatile memory. BIOS Password Reset Procedure

Follow these steps precisely to clear the supervisor or power-on password: M720q-Cmos-Maintenance-Jumper-Position

To reset the BIOS password on a Lenovo ThinkCentre M720q, you must use the physical Clear CMOS (Maintenance) jumper located on the motherboard. Modern Lenovo systems often store supervisor passwords in non-volatile memory, so simply removing the CMOS battery may not be effective. Step-by-Step Reset Procedure

Preparation: Turn off the computer and disconnect all power cords and cables. Open the chassis by removing the rear screw and sliding the cover forward.

Locate the Jumper: Find the Clear CMOS/Recovery jumper (often labeled as JP35 or near the Wi-Fi card area) on the system board.

Move the Jumper: By default, the jumper is on pins 1 and 2 (or 5 and 6 on some blocks). Move it to the maintenance position, pins 2 and 3 (or 2 and 4).

Power On: Reconnect the power cord and turn on the computer. Leave it on for about 10–30 seconds. You may hear a series of beeps indicating the system is in maintenance mode.

Shut Down: Turn off the computer by holding the power button for five seconds and disconnect the power cord again.

Restore Jumper: Move the jumper back to its original standard position (pins 1 and 2). lenovo thinkcentre m720q bios password reset

Finalize: Replace the cover, reconnect cables, and power on. Press F1 during the Lenovo splash screen to enter the BIOS. The password should now be cleared or reset to default.

For a visual walkthrough of the jumper positions and the beeping sequence: 08:49

The Ghost in the Tiny Box

Marta ran a small IT repair shop out of her garage. She’d seen it all: liquid damage, cracked screens, hard drives clicking their last breaths. But the device sitting on her anti-static mat today was different.

It was a Lenovo ThinkCentre M720q—a tiny, unassuming black box, no bigger than a paperback novel. It belonged to Dr. Elara Vance, a retired cryptographer who had recently passed away. Her nephew, Leo, had brought it in.

“She left it to me in her will,” Leo said, pushing up his glasses. “But there’s a problem. She put a BIOS password on it. A final lock.”

Marta nodded. “A supervisor password. On these ThinkCentres, that’s not a simple CMOS battery pull. It’s stored in flash memory. If we can’t get past it, the machine is a brick.”

Leo handed her a worn, leather-bound notebook. “She left this too. Said to give it to whoever tries to open the computer.”

Marta opened the notebook. It wasn’t code or encryption. It was a story.

“My first computer was a 286. I used to reset its BIOS by shorting two pins with a paperclip. For my M720q, I’ve hidden the master key not in silicon, but in sound.”

Marta’s eyes widened. She knew the trick. On older Lenovo desktops, a specific model of the M720q had a “backdoor” if you knew the right audio pattern. She plugged in a tiny speaker to the motherboard header, booted the machine, and listened.

The POST beeps came: not an error code, but a rhythm. Long, short, short, long. Pause. Short, long, long, short.

She grabbed the notebook again. Dr. Vance had written musical notes next to the beep sequences. Marta translated them into keypresses on a USB keyboard connected to a sacrificial laptop. She generated a “master unlock” hash—a string of characters that looked like ancient runes.

Her hands trembled as she plugged the USB drive containing that hash into the M720q and powered it on.

The Lenovo logo appeared. Then, a silver prompt: “Enter Supervisor Password:”

Marta didn’t type the hash. Instead, she held down the F1 key, then pressed Enter three times slowly, then released F1. The notebook’s final line read: “Old ghosts don’t use keys. They use knocks.”

The screen flickered.

And then, the BIOS menu unfolded before her—a digital treasure chest, opened not by force, but by a story.

Inside, the only file on the desktop was a text document titled: “For Leo. The real password is ‘Paperclip286’. I just wanted to make sure you found someone clever enough to read the instructions.”

Marta smiled. She didn’t remove the password. She simply added a new user: Leo. No password required. Forgetting or losing a BIOS password on a

Some locks aren’t meant to be broken. They’re meant to tell a story.

3) CMOS/RTC battery and CMOS clear headers — usually NOT effective for modern Lenovo desktops

Older desktops stored BIOS passwords in CMOS and could be cleared by removing the CMOS battery or using a jumper. Modern Lenovo ThinkCentre models often store passwords in firmware NVRAM or on the motherboard’s embedded controller; removing power or the CMOS battery typically will not clear a supervisor or power-on password.

However, a safe checklist if you want to try:

  1. Power down, unplug, disconnect all external devices.
  2. Open the case (observe ESD precautions).
  3. Locate the CMOS/RTC battery and any labeled “CLR_CMOS” or “PASSWORD” jumpers.
  4. If a jumper explicitly labeled for clearing password exists, follow the motherboard manual instructions (move jumper, power on briefly, move back).
  5. If only the coin cell is present, remove it for at least 10–30 minutes (some recommend longer). Reassemble and test.

Caveat: On M720q this often won’t help because passwords are stored in non-volatile firmware.

Method 2: Using a jumper on the motherboard

If you're comfortable with opening your computer's case and working with internal components, you can reset the BIOS password using a jumper on the motherboard.

Warning: Before attempting this method, make sure you have a good understanding of working with computer hardware and take anti-static precautions to prevent damage to your computer's components.

  1. Open your computer's case: Remove the screws that hold the side panel of your computer's case and remove the panel.
  2. Locate the CMOS jumper: Locate the CMOS jumper on the motherboard. The CMOS jumper is usually a 3-pin jumper labeled as "CLRCMOS" or "RTCRST".
  3. Clear the CMOS: Move the jumper from the default position to the clear position. The jumper positions may vary depending on your motherboard model, so consult your motherboard manual if you're unsure.
  4. Wait for 30 seconds: Wait for 30 seconds to allow the CMOS to clear.
  5. Replace the jumper: Replace the jumper to its default position.
  6. Close the case: Close the case and restart your computer.

5) Data recovery considerations

Method 3: Using a third-party tool

There are third-party tools available that can help you reset the BIOS password on your Lenovo ThinkCentre M720q. One popular tool is Hiren's BootCD.

Warning: Before using a third-party tool, make sure you download it from a reputable source to avoid malware or viruses.

  1. Download Hiren's BootCD: Download Hiren's BootCD from a reputable source and create a bootable USB drive.
  2. Boot from the USB drive: Restart your computer and boot from the USB drive.
  3. Select the BIOS password reset tool: Select the BIOS password reset tool from the Hiren's BootCD menu.
  4. Follow the instructions: Follow the instructions to reset the BIOS password.

Conclusion

Resetting the BIOS password on your Lenovo ThinkCentre M720q can be a challenging task, but it's doable using one of the methods outlined in this article. Before attempting to reset the BIOS password, make sure you have a good understanding of the risks and take necessary precautions to prevent data loss or damage to your computer's hardware.

If you're still having trouble resetting the BIOS password, you may want to consider contacting Lenovo support or a professional computer technician for assistance.

FAQs

Q: What if I forget the BIOS password on my Lenovo ThinkCentre M720q? A: If you forget the BIOS password, you can reset it using one of the methods outlined in this article.

Q: Can I reset the BIOS password on my Lenovo ThinkCentre M720q without opening the case? A: Yes, you can reset the BIOS password using the BIOS setup utility or a third-party tool without opening the case.

Q: Will resetting the BIOS password erase my data? A: No, resetting the BIOS password will not erase your data. However, it's always a good idea to back up your data regularly to prevent data loss.

Q: Can I use a third-party tool to reset the BIOS password on my Lenovo ThinkCentre M720q? A: Yes, there are third-party tools available that can help you reset the BIOS password on your Lenovo ThinkCentre M720q. However, make sure you download the tool from a reputable source to avoid malware or viruses.

To reset the BIOS password on a Lenovo ThinkCentre M720q Tiny , you must use the physical Clear CMOS / Recovery jumper located on the motherboard

. Simply removing the CMOS battery usually will not clear a Supervisor Password on modern ThinkCentre models. Steps to Reset the BIOS Password Preparation

: Turn off the computer and disconnect all power cords and external cables. Open the Case : Remove the computer cover to access the motherboard. Locate the Jumper : Look for the Clear CMOS / Recovery jumper (often labeled as

). On the M720q, it is typically a 3-pin header with a plastic jumper block covering two pins. Move the Jumper Identify the current position (usually Pins 1 and 2 Move the jumper block to the maintenance position ( Pins 2 and 3 Clear the Password Plug in the power cord and turn on the computer. The Ghost in the Tiny Box Marta ran

The system may beep or show a message indicating that CMOS has been cleared.

Once the system has finished this brief cycle, turn it off and disconnect the power again. Restore the Jumper : Move the jumper block back to its original position ( Pins 1 and 2 Reassemble : Replace the computer cover and reconnect your cables. : Power on the system and press repeatedly to enter the BIOS setup utility . The password should now be removed. Important Notes Supervisor vs. Power-On Password

: This method is specifically effective for clearing the Power-On Password. If a Supervisor Password

is set and remains after a CMOS clear, the motherboard may require professional service or replacement, as Lenovo designs these for high security. Hardware Maintenance Manual

: For a visual diagram of the jumper's exact location, refer to the Lenovo ThinkCentre M720q Hardware Maintenance Manual on the official Lenovo Support site on a motherboard diagram?

Erasing lost or forgotten passwords (clearing CMOS) - Lenovo

To reset the BIOS password on a Lenovo ThinkCentre M720q Go to product viewer dialog for this item.

, you must use the motherboard's physical Clear CMOS / Recovery jumper. Simply removing the CMOS battery will not clear the supervisor or power-on password on this model. 🛠️ Hardware Setup Power down the computer and disconnect all external cables. Remove the cover of the computer. Locate the Clear CMOS jumper on the motherboard. Position the unit so the rear ports are at the top.

Look for the jumper in the upper-left corner of the board. It is typically a small plastic block covering two of three pins. 🔄 The Reset Process

Follow these sequential steps precisely to erase the forgotten password:

Move the jumper from its standard position (covering pins 1 and 2) to the maintenance position (covering pins 2 and 3).

Connect the power cord back into the computer and turn it on. Leave it running for approximately 10 to 15 seconds. You may hear a series of short beeps; this is normal. Shut down the PC by holding the power button for 5 seconds. Disconnect the power cord from the machine once again.

Return the jumper back to its original standard position (covering pins 1 and 2). Put the cover back on and reattach your cables. 🖥️ Finalizing Settings Turn on the computer and the monitor.

Press F1 when the Lenovo logo appears to enter the BIOS menu. Save and exit to secure your cleared settings.

Step-by-Step Instructions:

Step 1: Full Disassembly

Step 2: Locate the EC Chip On the M720q motherboard, look for a small, square, flat chip with "IT8528E" or "IT8987" printed on it. This is the Embedded Controller that manages power and security.

Step 3: Find the Security Pins You are looking for pins labeled "KBC" (Keyboard Controller) or "SDA/SCL" near the EC. Based on community schematics for the M720q (IBM Lenovo FRU: 5B20S43790 or similar), you need to short pin 8 (GND) to pin 1 (SDA) of the EC's debug header.

Alternatively, many technicians use the "Southbridge short": Find two tiny resistors labeled R484 and R485 near the CMOS battery connector. Short those two resistors together with tweezers while powering on.

Step 4: The Reset Procedure

  1. Disconnect the main power and CMOS battery.
  2. Press and hold the power button for 30 seconds to drain capacitors.
  3. Reconnect the CMOS battery (but keep main power off).
  4. Using your tweezers, short the two identified pins.
  5. While holding the short, plug in the AC power.
  6. Press the power button. The PC will turn on, beep, and turn off automatically.
  7. Remove the tweezers immediately.
  8. Press the power button again.

If successful, the system will boot directly into the BIOS with a checksum error, and the password will be gone.

6) Corporate / stolen-device checks