BenQ WDC20C - User Manual

Questions and Answers

L
Lisa RodriguezAug 20, 2025
How to fix BenQ WDC20C Projector Accessories when screen is not appearing?
- H
  Holly SimmonsAug 20, 2025
  If your screen isn't appearing when you press the Button on your BenQ Projector Accessories, it could be due to several reasons. First, the system might be locked; to resolve this, go to Web Management, then Advanced Setting, and disable Screen Lock. Alternatively, the Button might be connected to another Host, in which case you should pair it again with the correct Host. Finally, ensure you're pressing the Present key long enough, until the LED indicator changes from green to blue.
K
Karen ParkAug 22, 2025
What to do if BenQ Projector Accessories show no HDMI signal?
- J
  John RothAug 22, 2025
  If the message "NO HDMI SIGNAL" from the Host appears on the display when the Button is presenting, or if your screen is blank gray while using BenQ Projector Accessories, it could be due to a loose connection between your laptop and the Button. Try reconnecting the USB-C™ cable of the Button. Another possibility is that your laptop isn't detecting the second monitor. In this case, reconnect the USB-C™ cable of the Button and reboot your laptop.
J
Joseph HuangAug 25, 2025
Why does BenQ Projector Accessories content disappear and LED blink red?
- M
  Matthew JohnstonAug 25, 2025
  If your content is removed from the display and the LED indicator of your BenQ Projector Accessories Button is blinking red, it indicates that the wireless connection between the Button and Host has been lost. The Host will attempt to restore the Wi-Fi connection automatically. If this fails, unplug the Button from your laptop and try again. Also, Wi-Fi interference or signal attenuation could be the cause. Ensure the transmission distance is within 15M and there are no obstacles.
A
Angela HolmesAug 26, 2025
Why is BenQ Projector Accessories LED blinking red?
- D
  Diana PerezAug 26, 2025
  If the LED indicator of the Button is blinking red when the power is on for your BenQ Projector Accessories, the Host might not be turned on. Make sure the Host is powered on. Alternatively, the Host may not have been paired with a Button; in this case, the Host should pair with the Button again. Wi-Fi interference or signal attenuation could also be the cause. Ensure the transmission distance is within 15M and with no obstacles.
S
Shirley ThomasAug 27, 2025
How to fix BenQ WDC20C Projector Accessories audio not playing?
- N
  newmannicoleAug 27, 2025
  If your screen is shown, but your audio is not playing on the audio system of the meeting room when using BenQ Projector Accessories, first check if the audio signal on your laptop is muted. Right-click on the speaker icon and switch off the mute. If that's not the issue, the audio output of the laptop might not be set to the second screen (BenQ InstaShow™ S) from the EDID of the Button. Change the default audio output to the second screen (BenQ InstaShow™ S) on the laptop.
M
michaelperezAug 29, 2025
What to do if BenQ WDC20C shows nothing?
- K
  Kim JonesAug 29, 2025
  If nothing is shown on the display at all when using BenQ Projector Accessories, first ensure that the display is switched on. If it is, check that the correct input is selected. Also, verify that the display cable is properly connected by reinserting the HDMI cable between the Host and the display device. If the display fails to show the Host’s output resolution at 1080p in "Guide Screen" or "Idle Screen", replace the display with one that supports output resolution at 1080p. Lastly, if the Host is in Network Standby Mode when the network standby function is enabled, press the Present key of the Button to start the presentation.
J
jcunninghamAug 31, 2025
Why does BenQ Projector Accessories screen flicker?
- J
  jacquelinewalkerAug 31, 2025
  If your screen turns blank or flickers when the Host is presenting via BenQ Projector Accessories, ensure that the product’s power is properly supplied or connected, as the issue may stem from an insufficient power supply.
G
Gina SimmonsSep 2, 2025
Why does BenQ WDC20C screen lag and audio break?
- J
  Jillian WatkinsSep 2, 2025
  If the screen lags seriously and the audio breaks up sometimes while using BenQ Projector Accessories, it may be due to Wi-Fi interference or signal attenuation. To resolve this, ensure the transmission distance is within 15M and with no obstacles. You can also restart the Host to rescan the Wi-Fi 5G channel.
E
Edward HughesSep 4, 2025
Why BenQ Projector Accessories doesn't detect second screen?
- N
  Nicole YoungSep 4, 2025
  If after connecting the Button to your laptop, the second screen (InstaShow™ S) cannot be detected by BenQ Projector Accessories, it could be due to a loose connection between your laptop and the Button. Reconnect the USB-C™ cable of the Button. If the issue persists, it might be a laptop problem. Try rebooting your laptop. Also, your laptop may not support USB-C ALT DP (Alternative DisplayPort) mode; check the USB-C capability with your laptop manufacturer. Finally, confirm that the Button is not shut down by reconnecting the USB-C™ cable of the Button.
M
meghanpetersonSep 6, 2025
What to do if BenQ WDC20C host is off?
- S
  Sherri FieldsSep 6, 2025
  If the Host is powered off when using BenQ Projector Accessories, briefly press the standby button on the Host. If the issue continues, the problem might be insufficient power supply. Change the power supply of the Host to a power adapter.

Summary

Introduction to InstaShow S

Key Product Features

True Plug & Play Operation

Simple connection and immediate presentation without software installation or setup.

Split Screen Presentation Capabilities

Supports up to four users presenting simultaneously in split screen configurations.

Touch Back Interaction Feature

Allows touchscreen control of the PC screen when connected to a touchscreen display via USB.

Package Contents and Accessories

Technical Product Specifications

InstaShow S Component Overview

InstaShow S Button Details

Details the Present key, Split screen key, USB-C connector, and RESET hole on the Button.

InstaShow S Host Details

Describes the Host's fixture parts, USB-A ports, HDMI, LAN, RESET, and other ports.

LED Indicator Meanings

InstaShow S Installation Guide

Environmental Conditions Check

Details necessary environmental checks such as temperature, humidity, and placement.

Connecting and Setting Up the Host

Steps for connecting the Host to display and power, covering four installation methods.

Host Assembly and Positioning

Mounting Host to Ceiling

Step-by-step guide for securely attaching the Host to a ceiling mount.

Ceiling Mount and Table Placement Options

Completing Host Table Placement

Wall or Trolley Mounting Instructions

Optimizing Antenna Positioning

Antenna Positioning for Ceiling Mounts

Specific antenna orientation for ceiling installations to maximize signal reception.

Antenna Positioning and Cable Connections

Assembling the Power Adapter

Connecting HDMI and Power Supply

LAN Connection and Button Setup

Button Setup and Additional Pairing

Pairing InstaShow S Buttons with Host

Pairing Host on Table

Specific steps for pairing the Button when the Host is placed on a table.

Pairing Process Initiation and Monitoring

Pairing Confirmation and Button Storage

Resetting the Host to Factory Defaults

Detailed Host Reset Procedure

Resetting Button and Enabling Standby Mode

Starting and Stopping Presentations

Preparing for Presentation

Ensures all devices are powered and ready for the presentation.

Initiating a Presentation

Steps to initiate a presentation, including connecting the Host and selecting the HDMI source.

Executing and Idling Presentations

Split Screen Presentation Functionality

Starting a Split Screen Presentation

Steps to connect Buttons, start a normal presentation, and activate split screen mode.

Switching Between Split and Full Screen Modes

Presenting with Mobile Devices

Touch Control and Remote Input

Introduction to Web Management

Accessing the Web Management Interface

Steps to access the web interface via a direct connection.

Logging In Via Direct Connection

Completing Web Management Login

Logging In Via LAN and Wireless Networks

Connecting to Host Wi-Fi Network

Getting Started with Web Management

Web Management Top Command Buttons

Explanation of the top command buttons, including changing language and logging out.

Web Management Main Column Details

System Information and Network Details

Accessing detailed information on System, WAN, Wireless Network, and Screen Message.

Customizing Guide and Idle Screens

Configuring WAN Settings

Wireless Network Settings

Wi-Fi SSID and Security Settings

Configuring the Wi-Fi SSID, security options, password, and isolation settings.

Wi-Fi Radio Setup Options

Adjusting transmission power, Wi-Fi area, channels, and modes for Wi-Fi signals.

Wi-Fi Security Options Explained

Configuring Wi-Fi Frequencies and Power

Channel Selection for Wi-Fi Signals

Wi-Fi Channel Width and Mode Settings

Viewing Connected Wireless Devices

Pairing Devices via Web Management

Pairing Status Overview

Displays the current pairing status of connected Buttons with the Host.

Executing and Confirming Pairing Process

Advanced Host Configuration Settings

Firewall Setup and Security

Setting up the firewall to block or accept WAN port access for security.

Host Output Resolution and Screen Scale

Configuring Split Screen, Encryption, and Login Code

HDCP Auto and AirPlay;Chromecast Settings

Network Standby and System Restart;Sleep

Scheduling System Time and Restarts

Tool Menu and Password Setup

Changing Web Management Password

Steps to change the password for accessing the web management interface.

Firmware Upgrade Procedures

Checking for Host Firmware Updates

Instructions on how to check for available firmware updates for the Host.

Performing Host Firmware Upgrade

Upgrading Button Firmware from Local File

Upgrading Button Firmware from Host

Configuration Management and Backup

Wi-Fi Traffic Test Functionality

Selecting Channel for Wi-Fi Test

Running Wi-Fi Speed Test

System Log Management and Viewing

Troubleshooting Screen Display Issues

Screen Display Troubleshooting

Resolving issues where the screen does not appear, flickers, or shows "NO HDMI SIGNAL".

Troubleshooting Button Issues

Troubleshooting Host Display and Pairing

Troubleshooting Software and Login Issues