If you have a display adapter for your laptop connect that to the vga cable before connecting it to your laptop.
Vga cable can t connect to projector.
Turn on your laptop first.
If there is no vga output port on your laptop connect a vga adapter for the video output that your laptop does have such as an hdmi to vga adapter or dvi to vga adapter.
The hdmi to vga adapter enables you to link the hdmi output from your computer laptop onto the vga projector.
After that you should connect the video cable from your laptop s external video port to the projector.
Set your laptop next to the projector.
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Plug one end of a vga cable into the vga output port on the laptop.
Plug one end of vga cable shown above into the computer 1 in port on the projector.