电视机不联网能用hdmi投屏吗？

Yes， a television that is not connected to the internet can still be used for HDMI screen projection. As long as the TV has an HDMI input port and the device you want to project has an HDMI output port， you can connect them via an HDMI cable and project the content onto the TV screen.

HDMI (High-Definition Multimedia Interface) is a widely used technology for transmitting high-definition audio and video signals from one device to another. It provides a digital connection that supports high-quality video and audio without any degradation in signal quality. HDMI cables can be used to connect a variety of devices such as computers， Blu-ray players， gaming consoles， and projectors to a television， and they can be used for screen mirroring and projection.

To use HDMI screen projection， you'll need to ensure that your device supports HDMI output and that your television has an HDMI input port. Once you've connected the devices with the HDMI cable， you'll need to adjust the TV settings to select the correct input source. You can then use your device normally and the content will be displayed on the TV screen.

Overall， HDMI screen projection is a convenient way to enjoy high-quality audio and video content on a television without the need to connect the TV to the internet. It's a simple and effective solution for those who want to enjoy their favorite movies， TV shows， and other media on a larger screen.