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Rebuilding an Ingenico Device via LLT

Rebuilding an Ingenico Device via LLT

This guide will cover wiping a device in the Ingenico application LLT and then reloading the device with the latest UPP (Device Operating System) and the latest PayGuardian Desktop or Cloud apps.

1. Prerequisites

  • Must have the device connected to a PC via an USB Ingenico specific USB cable.

  • Must have the ability to install a 3rd party application on the windows machine the device is plugged into.

2. Install LLT

Install the LLT tool on the windows machine the device is plugged into.

3. Reboot the Device in LLT Mode

  1. Hold down the pound key and yellow key to reboot.

  2. When “Welcome” and scrolling dots are on screen, hold down the pound key (period key) until the device reboots in LLT mode (LLT will display on the device screen)

4. Wiping/Clearing the Device

  1. Ensure the device is plugged into the windows machine via USB

  2. Open the LLT application

  3. Click “Advanced mode”

    1. image-20250529-183225.png

  4. On the bottom right, double click the terminal to connect to the terminal.

  5. Click the Box icon in the top right

  6. Click the Broom icon

    1. image-20250520-184612.png

  7. Click yes on the pop-up and then click “Uninstall these ____ components.”

    1. image-20250529-185547.png
    2. image-20250520-184840.png
    3. image-20250529-185653.png

  8. Double click the terminal to disconnect to the terminal. This may take some time, but you will wait until the device reboots. When the device comes back online, it will be wiped/cleared.

5. Installing UPP & PayGuardian Cloud Application

  1. Download the proper device ZIP file from this page: PayGuardian Cloud Tetra Solution | Download Files for Device Distributors

  2. Once downloaded, extract all ZIP contents

  3. Reboot the device in LLT mode (Section 3 above)

  4. Click “Advanced mode”

    1. image-20250529-183225.png

  5. On the bottom right, double click the terminal to connect to the terminal.

  6. On the left side of LLT, find the downloaded and extracted folder and drill down until you see a pink open folder. Drag this folder in LLT to the right section. Progress bar will appear.

    1. image-20250529-190242.png

  7. When progress bar has reached 100% without error, double click the device in the bottom right

  8. The device will reboot (maybe multiple times).

  9. When asked about Key Injection choose No Key Injection and then choose yes

  10. The device will reboot. The device is now ready to use.

6. Installing UPP & PayGuardian Desktop Application

  1. Download the proper device ZIP file from this page: PayGuardian Desktop | PayGuardian Desktop Packages For Distributors

  2. Once downloaded, extract all ZIP contents

  3. Reboot the device in LLT mode (Section 3 above)

  4. Click “Advanced mode”

    1. image-20250529-183225.png

  5. On the bottom right, double click the terminal to connect to the terminal.

  6. On the left side of LLT, find the downloaded and extracted folder and drill down until you see a pink open folder. Drag this folder in LLT to the right section. Progress bar will appear.

    1. image-20250529-190242.png

  7. When progress bar has reached 100% without error, double click the device in the bottom right

  8. The device will reboot (maybe multiple times).

  9. When asked about Key Injection choose No Key Injection and then choose yes

  10. The device will reboot. The device is now ready to use.

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