BenQ RM8602K 86" Class 4K UHD Educational Touchscreen LED Display - Manual (Page 74)

74 Troubleshooting
Strong light reflection.
Re-direct the lights or move the display to another location
to avoid unwanted reflections from light sources.
The interactive software
(purchased and installed separately
by user) may not be compatible
with the system. • Try with a different version of interactive software.
• Try with the basic drawing program pre-installed on your
computer. (e.g. Microsoft Paint in Windows).
Poor USB connection.
Check if the USB cable has been connected properly, or
try with another USB cable.