BenQ 9H.F6GPK.NA4 Installation Handbook page 98

Please check if the settings in the OSD are the same for all
displays.
Please confirm the total units are not exceeded the suggested
daisy chain Q'ty:
VGA: Suggested 4 units; Max. 9 units
DVI/HDMI/Display Port: Suggested 12 units; Max. 16 units
Try to connect to our display directly if splitter/matrix/video wall
controller is used.
Compatibility
Please change another signal cable and check if this problem is
related to signal cable (better quality & shielding cable is
recommended).
Please connect the Pattern generator (PC/Notebook/media
player) and display at the same power source, and make sure the
power cable has ground pin to avoid the noise interference.
Please connect the Pattern generator (PC/Notebook/media
player) and display at different power source, and make sure the
power cable has ground pin to avoid the noise interference.
Check if the display name could be shown. If it is not shown,
please press detect button again.
Please make sure the graphic card driver is the latest version.
93 Appendix 3: Basic Troubleshooting Checklists for
Check item
Check item
Does the
problem still
Check if
exist?
completed
Yes
Does the
problem still
Check if
exist?
completed
Yes
No
No