Are you troubled by issues with your advertising machine such as black screens, no sound, or inability to read cards? As a professional manufacturer of advertising machines, we understand that these malfunctions can directly impact your business operations. For this reason, we have carefully compiled this ultimate troubleshooting guide to help you quickly identify problems, find solutions, and learn how to properly maintain your equipment to effectively extend the lifespan of your advertising machine.
Quick Troubleshooting: Common Faults and Solutions
This section provides clear troubleshooting steps for urgent issues, helping you quickly restore your device to normal operation.
1.1 Power and Display Faults
Issue 1: The advertising machine screen is black or has no display.
This is one of the most common issues, usually caused by the following reasons:
Troubleshooting Steps:
Check the power supply: Ensure that the dedicated power supply for the advertising machine is connected and the power cable is securely plugged in. Observe whether the device indicator light is on.
Check the signal cable: This is a frequent cause of issues! Please check if the signal cable (HDMI, VGA, etc.) connecting to the computer or playback box is firmly plugged in at both ends, and inspect the pins inside the ports for any bending or breakage.
Check the scheduled power on/off settings: Enter the system settings to confirm whether the scheduled shutdown function has been inadvertently enabled.
If the issue persists, please click to view the detailed article:
"What to Do When the Advertising Machine Screen Has No Display, Goes Black, or the Indicator Light Blinks?"
Issue 2: The advertising machine has no power at all, and the indicator light does not illuminate.
If the device shows no response whatsoever, the problem typically lies in the power supply.
Troubleshooting Steps:
Check if the power outlet has electricity (you can verify by plugging in another device).
Inspect the power cable for any damage.
Internal inspection: It may be due to a faulty internal power module or loose wiring. It is recommended to contact a professional technician for further inspection.
If the issue remains unresolved, please click to view the detailed article: "What to Do When the Advertising Machine Shows No Response After Being Plugged In?"
Issue 3: Screen flickering or shaking
Possible causes and solutions:
Magnetic Interference:
Move the advertising machine away from high-power appliances, strong magnets, or transformers.Unstable Power Supply Voltage:
Ensure the power supply voltage is stable, and avoid sharing the same circuit with high-power devices such as air conditioners.Graphics Card Driver or Settings Issues:
Update the graphics card driver and try adjusting the screen refresh rate in the computer’s display settings.
If the issue persists, please click to view the detailed article: "What Causes Screen Flickering in Advertising Machines?"
Issue 4: Interference patterns appear on the screen during power-on or shutdown.
Causes and Solutions:
This is typically caused by signal interference from the graphics card, which is a normal phenomenon. You can resolve this issue by adjusting the "Phase" setting in the advertising machine’s menu or the computer’s graphics card settings, either automatically or manually.
If the issue persists, please click to view the detailed article:
"Is It Normal for Interference Patterns to Appear on the Advertising Display Screen During Startup or Shutdown?"
Sound and Content Playback Issues
Issue 5: No Sound or Abnormal Sound from the Advertising Machine
Troubleshooting Steps:
Check Physical Connections:
Inspect whether the amplifier on the driver board is functioning properly and ensure the speaker connection cables are not detached or loose.Check Software Settings:
Confirm that the system volume and player volume are not muted or set to the lowest level.Identify Hardware Damage:
If the speaker produces severe static noise or distorted sound, it is likely that the driver board or the speaker itself is damaged and requires replacement.
If the issue persists, please click to view the detailed article: "How to Fix No Sound or Abnormal Sound from the Advertising Machine?"
Issue 6: The advertising machine cannot read the USB drive or SD card
Troubleshooting Steps:
Check the Storage Device:
Try connecting the USB drive/SD card to another device to confirm it is not damaged.Check the Card Slot:
Inspect the pins inside the device’s card slot for any bending.Check the File Format:
Ensure your video/image file formats are supported by the advertising machine (e.g., MP4, AVI, JPG, etc.).Check the Motherboard:
If none of the above issues are found, the USB/SD module on the motherboard may be faulty.
If the issue persists, please click to view the detailed article: "What to Do When the Advertising Machine Cannot Read a USB Drive or SD Card?"
Hardware and Control-Related Issues
Issue 7: The Advertising Machine Remote Control is Not Working
Troubleshooting Steps:
First Solution: Replace the Batteries.
This is the most common and easily overlooked cause.Check for Obstructions.
Ensure there are no obstacles between the remote control and the remote receiver of the advertising machine.Identify Hardware Faults.
If replacing the batteries does not resolve the issue, it may be due to a faulty remote control, remote receiver, or motherboard.
If the issue persists, please click to view the detailed article: "What to Do When the Remote Control for the Advertising Machine is Not Working?"
II. Daily Usage and Maintenance Guide
Proper daily maintenance can significantly reduce the occurrence of malfunctions and extend the lifespan of the equipment.
Issue 8: How to Properly Clean the Advertising Machine?
Incorrect cleaning is a major cause of screen damage.
Screen Cleaning:
Tools: Use a soft microfiber cloth, lens tissue, or a dedicated cleaning cloth.
Method: Gently remove surface dust first, then spray a small amount of screen-specific cleaner onto the cloth and wipe in one direction. Never spray the cleaner directly onto the screen to prevent liquid from seeping in.
Case Cleaning:
Tools: Use a cotton cloth dampened with water to wipe the surface.
Note: Avoid using any chemical cleaners (such as alcohol, ammonia, etc.), as they may corrode or discolor the case.
If you still have questions or need further guidance, please click to view the detailed article: "How to Properly Clean the Screen and Case of an Advertising Machine?"
Issue 9: Can the Advertising Machine Operate 24 Hours Non-Stop?
Yes, it can. Liquid crystal advertising machines generate low heat and consume minimal power, and are designed to support long-term continuous operation. However, from a maintenance perspective, we recommend the following:
Allow the device to rest for 2–4 hours during non-business hours once a week or every two weeks.
This practice helps alleviate the aging of internal components and effectively extends their service life.
If you still have questions or need further details, please click to view the detailed article: "Can LCD Advertising Machines Operate Continuously for Long Periods?"
Issue 10: What Causes Thumb-Sized Dark/Gray Spots on the Screen?
This is typically caused by physical pressure that deforms the polarizer inside the LCD panel. It often occurs when the screen is accidentally pressed during transportation or cleaning.
Impact:
While it generally does not affect the overall lifespan of the device, it permanently impairs the viewing experience and aesthetic appeal.
Prevention:
When cleaning or moving the device, always avoid applying direct pressure to the center of the screen.
If you still have questions or need further details, please click to view the detailed article: "What Causes Thumb-Sized Dark/Gray Spots on the Advertising Machine Screen?"
III. When Is Professional Help Needed?
If you have tried all the troubleshooting steps mentioned above and the issue remains unresolved, it is likely due to a more complex hardware fault. To avoid causing further damage through self-disassembly, we recommend that you immediately contact our professional technical support team.