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7004t-lm-v3 Password Reset Portable | EASY — HANDBOOK |

Complete Guide: How to Perform a 7004t-lm-v3 Password Reset (Firmware v3)

Method 1: Hardware Factory Reset (Recommended)

This is the standard procedure for the Dahua E-SS (Eco-Savvy) and LM series recorders. This requires physical access to the unit.

What you need:

Procedure:

  1. Power Down: Switch off the XVR using the rear power switch or unplug the power adapter.
  2. Locate the Reset Button:
    • Look at the rear I/O panel. There is usually a small black button labeled Reset or a small pinhole.
    • Note: On some newer LM models, the button may be located on the bottom or side casing, but it is typically on the back near the Video Out ports.
  3. Press and Hold: Use the screwdriver/paperclip to press and hold the Reset button.
  4. Power Up: While continuing to hold the Reset button, turn the power switch ON (or plug the power back in).
  5. Hold for 10-15 Seconds: Keep holding the button. You will hear a single beep shortly after startup. Continue holding until you hear two beeps or the device reboots automatically.
  6. Release: Release the button. The XVR will restart.
  7. Login:
    • Username: admin
    • Password: admin (If "admin" does not work, leave the password field blank).

If the device does not reset, try the procedure again, holding the button for up to 30 seconds.

Overview

The 7004T-LM-V3 is a device/model that may require a password reset when access is lost. The following steps outline common, safe procedures to regain access. Apply only procedures appropriate to your device and environment; some steps may erase configuration or data. 7004t-lm-v3 password reset

Method 3: Serial Console Recovery (Advanced/Engineer Level)

If the web interface is unresponsive or the password reset fails, you can access the underlying Linux OS (BusyBox/OpenWRT based) via the Serial Console (UART). This method is used by engineers to recover "bricked" devices or force a password change without wiping configs.

Requirements:

Procedure:

  1. Open the Case: Remove the screws (often hidden under rubber feet) to access the main PCB.
  2. Locate UART Headers: Look for a 4-pin header labeled J1, CON1, or UART. It usually has pins for VCC, GND, TX, and RX.
    • Note: Sometimes these are unpopulated pads requiring soldering.
  3. Connect the Adapter:
    • Connect GND, TX (Adapter) to RX (Device), and RX (Adapter) to TX (Device). Do not connect VCC.
  4. Configure Terminal:
    • Baud Rate: Usually 115200 (standard for WNC/Laird devices).
    • Data Bits: 8 | Parity: None | Stop Bits: 1.
  5. Boot and Interrupt:
    • Power on the device while watching the terminal output.
    • You may see a prompt to "Hit any key to stop autoboot." Press a key to enter the U-Boot bootloader.
  6. Reset Password (U-Boot Environment):
    • If you enter U-Boot, you can boot into single-user mode or modify the environment variables.
    • Common command: setenv bootargs single (then boot).
    • Once in the root shell, you can remount the filesystem as read-write and manually edit the /etc/passwd or /etc/shadow file to remove the hashed password string, allowing login with a blank password.
    • Command: mount -o remount,rw /
    • Command: vi /etc/passwd (Remove the 'x' or hash in the second field for the root/admin user).
    • Command: reboot

Post-reset steps

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