Thank you for visiting the HP Support Forums and Welcome. I have read your thread on your HP 2000 Notebook and not reading correctly when attached to the TV. You should just be able to have the HDMI cable connected from the computer to your TV and try tapping FN and F4 key to transfer the image from the computer to the TV while the HDMI cable is connected. Here is a document on troubleshooting audio problems with external speakers, headphones, and HDMI sound devices.
Hope this helps.
Thanks