If the TV has no built-in screen mirroring function, but you want to project the screen of the device onto the TV, you can try the following methods:

1. Buy a wireless screen projector: The wireless screen projector can make old equipment have the function of network-free screen projection, which is simple to operate and can achieve the screen projection effect by plugging in the power supply.

2. Buy TV box: TV box belongs to its own resources, and you can download software at will to realize screen projection.

3. Use HDMI cable: Use HDMI cable to connect the device directly to the TV, just plug one end of the HDMI cable into the HDMI port of the device and the other end into the HDMI port of the TV. Then, switch the input of the TV to the HDMI port of the plugged-in device.

4. Wired connection: If your TV doesn't have an HDMI interface, it can also be used as a display device as long as it has a Type-C or full-featured Type-C interface. For example, you can connect the tablet/mobile phone to the TV through the Type-C to HDMI converter +HDMI cable, and then confirm the wired screen projection function on the device side to realize screen projection.