BenQ PH460, Installation Handbook

Page: 81 / 84

81 Appendix 2: basic troubleshooting checklists
Flickering picture
Condensation
Condensation on the inner side of the glass is a natural phenomenon when the temperature
and humidity of the air change quickly. Condensation may occur if the display is powered on
after not being used for a long time, or if the heating system of the room is switched on. And it
may last for hours.
Double or parallel lines
Check item
Check if
completed
Does the
problem still
exist?
Yes No
Please try with another video signal cable (HDMI / D-Sub / DVI /
DP).
Please try with another video input. For example, change from
D-Sub to HDMI or DVI.
Please try with another video source. For example, change a
computer.
Check if all cables are connected properly.
Un-plug the USB cable (if connected, Figure 3 ).
Please try with a D-Sub cable with a thicker EMI core (ferrite
filter,
Figure 10 ), which suppresses more high frequency noise.
Check item
Check if
completed
Does the
problem still
exist?
Yes No
Keep the display powered on for at least 24 hours.
Keep the display away from the window.
Check item
Check if
completed
Does the
problem still
exist?
Yes No
Please try with a thicker touch pen (6 mm as recommended,
Figure 9 ).
Please try to draw the lines in Windows Paint (for Windows
operating systems).