How to fix 'Signal out of range' on BenQ RP840 Interactive whiteboard?
If your BenQ Interactive whiteboard displays a 'Signal out of range' message, verify that the display settings are correct and the resolution is set to the optimal value. You can also try adjusting the line and field synchronization in the menu.
How to correct touch positioning on BenQ RP840?
To correct the touch positioning on your BenQ Interactive whiteboard: * Check that the driver is properly installed and make the necessary corrections. * Ensure the touch pen is facing the screen.
Why is the touch function invalid on my BenQ Interactive whiteboard?
If the touch function on your BenQ Interactive whiteboard isn't working, verify that the touch driver is installed and running. Also, ensure that the size of the object you're using to touch the screen is comparable to a finger.
Why is the touch positioning not correct on my BenQ RP840 Interactive whiteboard?
If the touch positioning is not correct on your BenQ Interactive whiteboard, check that the driver is properly installed and calibrated. Also, ensure that the touch pen is facing the screen correctly.
How do I remove vertical lines or streaks on my BenQ RP840 Interactive whiteboard background?
If the background of your BenQ Interactive whiteboard has vertical lines or streaks, try selecting automatic correction in the menu. If that doesn't resolve the issue, adjust the clock and phase position in the menu settings.
Why does only one speaker have sound on my BenQ Interactive whiteboard?
If only one speaker has sound on your BenQ Interactive whiteboard, adjust the sound balance in the menu. Check whether the computer sound control panel is set up for only one sound channel. Also, verify that the audio line is connected correctly.
Why does my BenQ RP840 have image but without sound?
If your BenQ Interactive whiteboard has an image but no sound, try the following: * Check if the mute button is activated. * Adjust the volume using the VOL+/VOL- buttons. * Verify that the audio line is connected correctly.
Why does only one speaker have sound on BenQ RP840 Interactive whiteboard?
If only one speaker is producing sound on your BenQ Interactive whiteboard: * Adjust the sound balance in the menu. * Check if the computer sound control panel is set to only one sound channel. * Verify that the audio line is connected correctly.
Why does BenQ Interactive whiteboard machine automatically shutdown?
If your BenQ Interactive whiteboard is automatically shutting down, consider the following: * Check the sleep settings. * Check for any recent power outages. * Check if the automatic shutdown feature is enabled when there is no signal.
What to do if BenQ Interactive whiteboard control panel buttons do not work?
If the control panel buttons on your BenQ Interactive whiteboard aren't working, check if the control panel buttons are locked. If they are, unlock them.
General| Brightness | 350 cd/m² |
|---|---|
| Response Time | 8 ms |
| Screen Size | 84 inches |
| Resolution | 3840 x 2160 (4K UHD) |
| Touch Technology | Infrared |
| Contrast Ratio | 1200:1 |
| Operating System | Android |
| Speakers | 2 x 15W |
| Connectivity | HDMI, USB, LAN |
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