add faq

docs/source/faq.rst

@@ -1,26 +1,66 @@
 FAQ
-========
+=============
 
-1. **The colored picture appears in black and white.**
+Issue 1: Black border appears on the display?
+--------------------------------------------------
 
-   **A:** Please check whether the saturation, brightness and contrast under the Color
-   menu are adjusted properly.
-
-2. **No picture is displayed on the screen after the device powers on.**
+    * Select the correct resolution
+
+    Click the **Raspberry Pi icon** -> **Preferences** -> **Screen Configuration**.
 
-   **A:** Please check whether the HDMI output port is plugged properly. And also
-   please make sure the suitable adapter is connected to the LCD displayed.
-
-3. **The picture is distorted in color or displayed with color abnormity like a certain color missing.**
+    .. image:: img/screen_config.png
 
-   **A:** Please check whether the signal wire is plugged in a good way. If the wire
-   is defective or the wiring is loose, the signal transmission may be influenced,
-   thus causing the fault.
-
-4. **There appears stripe interference on the display and the picture is dark.**
+    Then choose **Configure** -> **Screens** -> **HDMI-1** -> **Resolution** -> choose the 1280x800.
 
-   **A:** Please check whether the socket and the plug are in good contact.
-
-5. **The LCD cannot be turned on when no other equipment is connected.**
+    .. image:: img/resolution.png
 
-   **A:** This is normal, please use it after connecting Raspberry Pi or other devices.
+    After that you need to click the tick icon to save your configure.
+
+    .. image:: img/hdmi1.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
+
+Issue 2: No Sound
+----------------------
+
+    * If your display has no sound, you need to confirm the current Audio output mode. Analog mode is used to output to the headphones, and HDMI mode is output to the speakers.
+
+    .. image:: img/hdmi_analog.png
+
+    * Make sure that the speaker wires are well connected.
+    * Adjust the volume level by using the buttons on the driver board. If there is still no sound, please contact us.
+
+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.