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FAQ
=============

.. Black border appears on the display?
.. --------------------------------------------------

.. * **Select the correct resolution**
    
..   1. Click the **Raspberry Pi icon** -> **Preferences** -> **Screen Configuration**.
  
..      .. image:: img/quick_rpi_config.png
  
..   2. In the configuration menu, click the triangle icon at the bottom left corner, select **HDMI-A-1** -> **Resolution**, and choose your desired resolution.
  
..      .. image:: img/quick_rpi_resolution.png
  
..   3. Finally, click **Apply** -> **OK** to save and apply the changes.
  
..      .. image:: img/quick_rpi_apply.png

.. .. * Disable Overscan/Underscan

.. ..   When using Raspberry Pi Imager to install a system on a Micro SD, you can check the Disable overscan.
  
.. ..   .. image:: img/oversccan.png  
.. ..   Or when you get to the desktop, click the **Raspberry Pi icon** -> **Preferences** -> **Raspberry Pi Configuration**.
  
.. ..   .. image:: img/screen_config.png  
.. ..   Disable Overscan in the Display page.  
.. ..   .. image:: img/disable_overscan.png



The screen shows No Signal after the device is turned on?
-------------------------------------------------------------

* Please check if all the cables are plugged in properly.
* Check if the control board (Raspberry Pi) is on.
* Check if the SD card has the correct system installed.

Can't touch?
-------------

* Make sure the touch module is connected to the control board (or device) via the USB touch cable.
* Check if the touch module is damaged, if so please contact us.

Use of the touch pen
-------------------------

* This display works with passive capacitive stylus, while active capacitive does not.

The LCD display cannot be turned on without connecting other devices.
-----------------------------------------------------------------------

* This is a normal phenomenon, please use it after connecting Raspberry Pi or other devices.