BenQ RM8602K 86" Class 4K UHD Educational Touchscreen LED Display - Manual (Page 93)

93 Appendix 2: Basic Troubleshooting Checklists for IFP & IL
Noise/interference
Compatibility - Cannot detect IFP/DS
Android/APPs
Try with shorter cables (shorter than 3M for display cable/1.8M
for touch USB cable). If the problem is solved, please try to add
the repeater.
Check item
Check if
completed
Does the
problem still
exist?
Yes No
Check item
Check if
completed
Does the
problem still
exist?
Yes No
Unplug the USB cable.
If unplugging the USB cable can solve the problem, please use the
digital signal (ex. HDMI or DVI) with the touch USB cable.
Try to use another AC socket.
Try to use the AC jack without ground.
Check item
Check if
completed
Does the
problem still
exist?
Yes No
Try another PC/NB (different brand/model).
Try to add the repeater to boost the signal.
Check item
Check if
completed
Does the
problem still
exist?
Yes No
Uninstall any other non-BenQ authorized/preloaded APPs.
Clear the APP data (setting>Application>clear data).
Restore the setting under Android Setting.