you see the "No Signal" message when you display from a PC laptop,
you need to set up the laptop to display on an external
Hold down the laptop's Fn key and press the key labeled with a
monitor icon or CRT/LCD. (See
your laptop manual for details.) Wait a few seconds for an image to
appear. On Windows 7 or later, hold down the
Windows key and press P at the
same time, then click Duplicate.
To display on both the laptop's monitor and
the projector, try pressing the same keys again.
If the same image is not displayed by the
laptop and projector, check the Windows Display utility to make sure the external
monitor port is enabled and extended desktop mode is disabled. (See
your computer or Windows manual for instructions.)
If necessary, check your video card settings
and set the multiple display option to Mirror or Duplicate.