If
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
monitor.
On Windows 7 or later, hold down the Windows
key and press P at the same time,
then click Duplicate.
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 Clone, Mirror, or Duplicate.