Fast help for Donview interactive displays.

Work through the power path first. Many issues are caused by loose cables, switched-off outlets or standby mode.

• Confirm the power cable is firmly connected at the wall and display.
• Check the wall outlet, power board and any surge protector.
• Make sure the rear power switch on the panel is turned on.
• Try both the remote control and the front power button.
• Check whether the standby indicator light is on, flashing or completely off.
• Disconnect power for 60 seconds, reconnect and restart the display.

If the picture is visible but touch is not working, check the USB touch connection and the selected input.

• Confirm the USB touch cable is connected between the display and source device.
• Make sure the selected HDMI/VGA input matches the USB touch port being used.
• Restart both the display and connected computer.
• Test another USB cable and another USB port on the computer.
• Run touch calibration if the cursor is offset or inaccurate.
• For OPS computers, reseat the OPS module only after powering the unit down.

No signal faults are usually caused by input selection, cable quality or laptop display settings.

• Select the correct HDMI input from the panel source menu.
• Test with a known-working HDMI cable.
• Check laptop display settings and select duplicate or extend display.
• Try a lower resolution or refresh rate if the source device is older.
• Connect a second source device to confirm whether the issue is the panel or computer.
• Avoid long HDMI runs unless using certified cables or extenders.

Audio issues can come from the panel, source device, browser tab, meeting software or external amplifier.

• Check panel volume and confirm mute is off.
• Confirm the computer audio output is set to HDMI or the correct display device.
• Check volume inside Teams, Zoom, browser tabs or media players.
• Test audio from a different source device.
• If external speakers are installed, check amplifier power, input and volume.

Wireless sharing depends heavily on network configuration, device permissions and software compatibility.

• Confirm both devices are on the same network where required.
• Restart the wireless casting app/module and the source device.
• Check school or corporate firewall rules that may block screen sharing.
• Confirm Bluetooth, Wi-Fi and local network permissions are enabled.
• Update approved casting software where required.

Only install firmware supplied or approved for the exact display model. Incorrect firmware can cause faults.

• Contact Donview support before applying firmware updates.
• Provide the model, serial number and current software version.
• Use approved touch drivers for connected Windows or OPS systems.
• Check OPS module compatibility before operating system upgrades.
• Do not interrupt power during firmware updates.

Correct installation protects the screen, improves reliability and reduces future service issues.

• Use certified wall mounts or mobile stands rated for the display size and weight.
• Allow ventilation around the panel and avoid blocking air vents.
• Avoid moisture, direct heat and unstable mounting surfaces.
• Use surge protection where recommended.
• Professional installation is strongly recommended for large format displays.

To speed up diagnosis, include clear details when lodging a warranty or service request.

• Model number and serial number.
• School, business or installation location.
• Description of the issue and when it started.
• Photos or short video of the fault.
• Details of connected devices, cables and network setup.