During an important meeting, is your conference all-in-one machine suddenly silent, has no signal, or is severely lagging? Don't panic! This ultimate troubleshooting guide will serve as your emergency manual, helping you quickly identify problems and restore smooth meetings.
Introduction: Say Goodbye to the Embarrassment of Interrupted Meetings
We understand that a smooth, professional meeting is crucial for your business. However, technical issues always arise unexpectedly. This article systematically outlines the five most common types of faults with conference all-in-one machines and provides step-by-step troubleshooting solutions, from basic to advanced. Whether you're an IT administrator or a regular employee, you can follow along step by step to resolve issues quickly.
Chapter 1: Audio Troubleshooting – Resolving "No Sound, Noise, Echo" Issues
1.1 Symptom: No Sound at All
Step 1: Check Physical Connections and Power
Confirm the conference all-in-one machine is powered on, and the volume is not muted or set to the minimum.
Check if the audio cable (e.g., 3.5mm audio cable, USB cable) connecting the all-in-one machine to the computer (if separate) is securely plugged in.
Step 2: Check System Audio Settings
In the computer's sound settings, ensure the conference all-in-one machine’s speakers are set as the "Default Output Device."
Right-click the sound icon in the system tray and select "Open Sound Settings" to verify and switch devices.
1.2 Symptom: Noise, Static, or Howling
Step 1: Adjust Device Placement to Avoid Howling
Ensure the all-in-one machine’s microphone and speakers are not directly facing each other and are not too close, as this is the main cause of howling (sharp high-frequency noise).
Reduce microphone gain or volume appropriately.
Step 2: Enable Software Noise Reduction
In the settings of your meeting software (e.g., Tencent Meeting, Zoom), locate the "Audio" options and check features such as "Suppress Background Noise," "Echo Cancellation," and "Automatically Adjust Microphone Volume."
Step 3: Check for External Interference
Try connecting the conference all-in-one machine to a different power outlet, avoiding sharing an outlet with high-power appliances.
Check the audio cable for damage and try replacing it with a high-quality cable.
If the above steps do not resolve your issue, please click here to view "Conference All-in-One Audio Issues (No Sound, Noise, Howling, Inconsistent Volume)."
Chapter 2: Display Troubleshooting – Resolving "No Signal, Blurry, Flickering" Issues
2.1 Symptom: Screen Displays "No Signal"
Step 1: Check Video Cable Connections
Confirm the HDMI, DP, or Type-C cable connecting the computer to the conference all-in-one machine is securely plugged in at both ends.
Try unplugging and replugging the cable, or replace it with a known-working video cable.
Step 2: Confirm Input Source Selection
Use the conference all-in-one machine’s remote control or OSD menu, press the "Source" or "Input" button, and ensure the selected signal source (e.g., HDMI 1, HDMI 2) matches the port your computer is connected to.
2.2 Symptom: Blurry Screen, Abnormal Resolution, or Flickering
Step 1: Adjust Computer Output Resolution
In the computer's display settings, adjust the output resolution to match the conference all-in-one machine’s native resolution (typically 1920x1080 or higher) and set an appropriate refresh rate (e.g., 60Hz).
Step 2: Update Graphics Card Driver
Outdated or corrupted graphics card drivers may cause display abnormalities. Visit the website of your computer’s graphics card manufacturer (e.g., NVIDIA, AMD, Intel) to download and install the latest driver.
If the above steps do not resolve your issue, please click here to view "Conference All-in-One Display Issues (No Signal, Blurry Screen, Flickering)."
Chapter 3: Control and Connection Troubleshooting – Resolving "Unresponsive Touch Screen, Peripheral Not Recognized" Issues
3.1 Symptom: Unresponsive Touch Screen
Step 1: Basic Checks
Check if the USB cable connecting the touch functionality is secure.
Restart the conference all-in-one machine to reset the touch system.
Step 2: Recalibrate and Reinstall Drivers
Look for the "Touch Screen Calibration" tool in the system settings and follow the prompts to calibrate.
Visit the official website of your conference all-in-one machine’s brand to download and reinstall the touch driver for the corresponding model.
3.2 Symptom: Built-in Camera/Microphone Not Recognized
Step 1: Check System Permissions
In the Windows/macOS privacy and security settings, ensure the meeting software has been granted access to the camera and microphone.
Step 2: Check Device Manager
In the computer’s "Device Manager," check if the conference all-in-one machine’s devices appear normally under "Imaging Devices" and "Audio Inputs and Outputs," without any yellow exclamation marks. If present, try updating the driver.
If the above steps do not resolve your issue, please click here to view "Conference All-in-One Device Control or Connection Issues (Unresponsive Touch Screen, Unable to Connect)."
Chapter 4: Network and Connection Troubleshooting – Resolving "Meeting Lag, Delay, Disconnection" Issues
4.1 Symptom: Video Conference Lag, Audio Delay, Pixelated Video
Step 1: Check Network Bandwidth
Run a network speed test. For high-definition video conferences, upload bandwidth is particularly important. It is recommended to close other bandwidth-intensive applications (e.g., file downloads, online video streaming).
Step 2: Prioritize Wired Connections
Connect the computer directly to the router using an Ethernet cable, as this is more stable and has lower latency than Wi-Fi. If the all-in-one machine itself supports video conferencing, prioritize using a wired connection.
Step 3: Adjust Meeting Software Settings
In the meeting software, disable "HD Video" or "1080P" options and reduce video quality appropriately, as this can significantly improve lag issues.
4.2 Symptom: Frequent Disconnections or Unable to Join Meetings
Step 1: Check Firewall/Security Software
Temporarily disable the firewall or security software to check if it is blocking the meeting software’s network connection. If resolved, add the meeting software to the firewall’s whitelist.
Step 2: Restart Network Devices
Restart your modem and router, as this is a classic solution for many network issues.
If the above steps do not resolve your issue, please click here to view "Conference All-in-One Network and Connection Issues During Video Conferences (Lag, Disconnections)."
Chapter 5: System Compatibility Troubleshooting – Resolving "Software Not Recognized, Functionality Issues"
5.1 Core Concept: Understanding BYOM Mode
Most modern conference all-in-one machines support BYOM (Bring Your Own Meeting) mode. This means the all-in-one machine itself is a premium audio-visual peripheral that can be directly used by any meeting software on your computer (e.g., Tencent Meeting, Zoom, Teams, DingTalk), ensuring the best audio-visual experience.
5.2 Common Symptoms and Solutions
Symptom: A specific meeting software cannot use the all-in-one machine’s camera or microphone.
Solution: Ensure the software has system permissions (see Chapter 3). In the software’s "Audio/Video" settings, manually select the corresponding device for your conference all-in-one machine instead of the system default device.
Symptom: Specific features of the all-in-one machine (e.g., touch writing synchronization) cannot be used.
Solution: Visit the official website to download and install the latest official drivers and supporting software. Ensure your operating system is compatible with the all-in-one machine’s software version.
If the above steps do not resolve your issue, please click here to view "Conference All-in-One System Compatibility and Multi-Platform Collaboration Issues."
Conclusion: If None of the Above Methods Work
If you have tried all relevant steps and the issue persists, it may indicate rare hardware failure. In this case, please contact us promptly.
To resolve your issue more efficiently, please prepare the following information before contacting our technical support:
Your conference all-in-one machine’s specific model.
Your computer’s operating system and version (e.g., Windows 11).
The meeting software you primarily use and its version.
A brief summary of the troubleshooting steps you have already attempted.
[Click here to contact our professional technical support team]
- Further Reading：
FAQ for LCD Video Wall - Comprehensive Guide on Troubleshooting, Installation, and Procurement
Touch All-in-One Machine FAQ Center: One-Stop Solution to All Your Problems