Step 1:
Finding The Identical Ports On Both Machines. The first step is to check that one of the above cords have a slot in the both machines i.e laptop and TV. You will need their required cables to connect them to each other. The picture below is the back of an Epson projector and the connections it allows;

Step 2:
Find An HDMI Cord. Like i said above, the best to use is the HDMI, latest computer's, laptops, and televisions should have an HDMI port. Just get an HDMI cord which you can purchase in any electronic stores or outlet.

Step 3:
Turn Off Both Devices And Connect one side of the cord to your laptop and the other to your television. Some laptops which do nit have HDMI port can be done using an adapter which you can also purchase in an electronic store.

Step 4:
Turn On your laptop and television, at this stage it should automatically display, but in some cases it might not, if it doesn't display immediately, it is no problem. You just need to switch to the correct TV Input or AV using your TV remote i.e if the port you inserted the HDMI to in the TV is labeled 'HDMI 2', you will need to switch the input to 'HDMI 2'. As soon as you enter the correct Input, your tutorial is over.


Source: http://www.inforetweet.com.ng/2017/03/use-your-tv-as-a-laptop-screen.html