Connecting Acer win8 laptop to sony via HDMI

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Hello,
I am trying to connect ACER AspireV5-472P, windows 8. Intel HD 4000 graphics card to sony LED TV via HDMI, initially it works fine, then small redlines start appearing and the TV screen starts to flicker with a message saying scene selection has been changed. Tried all resolutions and refresh rate, at wit's end.