i3TOUCH EXCELLENCE User Manual page 35

Step. 13 What to do if you can't duplicate your screen
If you can't duplicate your screen, contact your internal ICT support. Some computers have
onboard graphics of the motherboard controlling the display of the laptop (e.g. intel HD
Graphics 4000) but also have an extra (stronger) graphics card (e.g. Nvidea NVS 5200M) to
control (F)HD projectors or displays connected to the computer.
It can happen the settings you change in "display -> screen resolution" only change the onboard
graphics settings while the device connected to your HDMI-port is controlled by the graphics
card and it is difficult to duplicate. When duplicating you see this
or instead of
In that case you need to enter the control panel of your graphics card and choose duplicate or clone
with laptop display. Below is an example of Nvidea:
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