W8 not recognising HDMI tv connection

  meremere 04:14 02 Mar 2013
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Before we upgraded to Windows 8 had no problems running our HP Pavilion dv6 laptop (on Windows 7) through our Sony TV (HDMI connection) using a HDMI cable. It is not working now we have upgraded to W8? Thought it maybe that I need to download a new driver? Any suggestions...

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