To connect a Sony projector to a laptop, you need to use an HDMI cable, then switch the projection mode on the laptop, and finally change the signal source of the Sony projector. The specific steps are as follows.
3. Switch the signal source. Press the INPUT button on the Sony projector remote control, and then use the arrow keys to select the HDMI signal source.
The sony projector does not have an intelligent system, so it cannot directly cast the screen wirelessly. It can be wirelessly projected by connecting to the same screen or smart TV.