No signal in hdmi port [Closed]

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Hello,

i have been using my lg tva as my laptop monitor for 3 months connected by hdmi cable. today i connect my cable ,that time my lap shut down. after restart the external monitor is not working.no external projector is found. that the message i get. i connected to two external monitor but no result .i think there is no output signal in my hdmi port.please help me

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