I'm sorry about the issue. Was it working fine previously?
What's the model of your HP PC computer? Is it a desktop or laptop?
Is the computer currently working fine?
Does your computer have Windows XP, Vista, or 7 or 8 or 10?
Does your computer have a VGA port and/or an HDMI port?
Are you able to connect a cable from the computer to the TV?
Are you able to set the INPUT option on the TV remote control?
Please reply at the box below. Thank you,
On the computer, are you able to go to Control Panel -> Appearance and Personalization\Display -> Adjust resolution, and set up the Multiple displays option there?
Please type at the box below, then click on the Send button below to communicate with me, so I can help. Thank you,