Please follow the below instructions to connect a Laptop or Desktop
How to connect a Laptop or Desktop to the TV?
Laptop or Desktop can be connected with either HDMI or a VGA Cord
Step 1: Once connected, change the Source INPUT. Press Source on your TV remote and select the appropriate Input. If you have used HDMI Cable then select the Input to HDMI (1,2 or 3), if it's connected with a VGA Cable then select the Input to VGA
Step 2: After changing the Source Input, press and hold the Windows Logo key followed by letter P on the Laptop or Computer keyboard, you will see the following Screen…
Step 3: Select either Duplicate or Extend from the list of options for TV to display the content from your Laptop or Desktop