BenQ RM8602K 86" Class 4K UHD Educational Touchscreen LED Display - Manual (Page 78)

Troubleshooting 78
Troubleshooting
Problem Solution
No picture Check the following:
• Is the display turned on? Check the power indicator of the
display.
• Is the signal source device turned on? Turn on the device
and try again.
• Are there any loose cable connections? Make sure that all
cables are connected firmly.
• Have you chosen an unsupported output resolution on
the computer? Refer to Supported input signal resolution
on page 76 to select a supported resolution and try again.
• Have you chosen an unsupported output resolution on
the DVD or Blu-ray disc player? Refer to Supported input
signal resolution on page 76 to select a supported
resolution and try again.
No sound Check the following:
• Have you turned on the mute function on the display or
the input source device? Turn off the mute function or
increase the audio volume level and try again.
• Are there any loose cable connections? Make sure that all
cables are connected firmly.
The computer input
image looks strange
• Have you chosen an unsupported output resolution on
the computer? Refer to Supported input signal resolution
on page 76 to select a supported resolution and try again.
• Use the Auto function (VGA only) to let the display
automatically optimize the display of computer image.
• If the result of the Auto function is not satisfactory, use
the Phase , H Position and V Position functions to
manually adjust the image.
The control panel
buttons do not work
Have you locked the control panel buttons? Unlock the
buttons and try again.