Dell S500 Projector - Manual (Page 113)

Cannot select Interactive Check if there is a PC (VGA, HDMI, Wireless
and LAN source) input source.
Cannot use the Pen in 3D a The 3D source is not supported.
source.
b Output signal of 120 Hz is not supported.
Cannot use the Pen in Composite Video or S-Video source is not
Composite Video or S-Video supported.
source.
Cannot use Nib
If the Nib is worn out, replace with a new Nib.
When using USB Display, can Wireless USB function is not supported.
Wireless USB function be
used?
Troubleshooting Your Projector 113