to RBG - PC HDMI connection to the TV, but do get do not signal

I'm trying to connect my HP Pavilion DV2 to my LG 32 '' TV with HDMI cables RBG - PC, but I get no signal on the TV. What can I do?

Photo quality issues: Use a cable HDMI 5 meters (16 feet) long or less. Long distances can cause a degradation of the signal and the possible loss of quality audio and video. For longer distances, use a high grade cable (category 2) or a signal amplifier.
Image: Make sure that the source of input on the display device is set to the right connection HDMI used - especially when your monitor or your TV has more than one HDMI connector. For example, if your TV is connected to a DVD player with HDMI 2, make sure that the DVD player is configured to use the HDMI in its menu and make sure that the TV input source is set to HDMI 2.
Audio: Make sure that the HDMI audio is enabled in the digital camera of the source and the audio connection is connected to the audio output connector correct DTV.
If you are using a DVI-HDMI adapter, you need to connect audio cables separated from the device that sends the audio and video signal in any other device capable of audio playback (maybe it's the TV or monitor is also used to display a video if the device has loudspeakers and separate audio inputs).
If you try to send audio via HDMI to a PC, make sure that any built-in audio in the BIOS is set to Auto and make sure audio HDMI is selected for the main audio output of the operating system (for example, Windows Audio properties in the control panel).
For more audio troubleshooting information, see HP TVs - solving Audio problems or using HDMI Audio with a desktop computer.
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