You can try using the Hardware and Devices troubleshooter to fix the problem. It checks for common problems and makes sure that any new device or hardware connected to your PC is installed correctly.
• Open the Hardware and Devices troubleshooter by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Search), entering hardware and devices in the search box, tapping or clicking Settings, and then tapping or clicking Find and fix problems with devices. You might be asked for an admin password or to confirm your choice.
These links were helpful to fix some PC's.
http://digitalpbk.com/hdmi/connect-laptop-tv-using-hdmi-port
http://www.tomshardware.com/forum/17285-63-connecting-hdmi-cable-acer-aspire-5741z
http://www.ehow.com/how_6397048_connect-acer-aspire-one-tv.html
Here, Refer: Product Description
http://www.amazon.co.uk/Acer-Aspire-Desktop-Windows-Premium/dp/B0070UP4WM
--http://g-ecx.images-amazon.com/images/G/02/uk-electronics/product_content/Acer/X3990_HDMI.jpg
http://uk.answers.yahoo.com/question/index?qid=20130225143306AA8Po8H
i have the same problem with my acer aspire v3-571 i7 i cannot connect it with my tv screen please help me out my laptop is brand new and i hate that the hdmi dosent work.