I have a samsung lcd tv and am trying to connect my lap top through an hdmi lead. The tv shows an error that there is no signal. I have followed the instructions shown in the tv manual and have changed the settings to 1920x1080 but to no avail please can you help me?

check the source which gives you the signal for the hdmi! for an example, if you hook up you lap-top via hdmi with the tv, there is a setting on the lap-top and you choose: 1. transmit picture, 2. transmit sound, or do not transmit anything.

you need a pc with an hdmi out jack or use a tower pc with a card that has hdmi out

When you have the tv connected and both on, Switch the TV to the HDMI feed then press the [FN] key and hold and start pressing the [F4] key counting to 10 between presses. You have to tell the computer bios to activate the external port and send video signal to that port.

What operating system are you using? If you are using Windows 7, right click on the Volume icon on the system tray and select "Playback Devices". A window would pop up showing you speaker and HDMI. Select HDMI and then choose the "Set Default" Button on top of the OK button. Thats it! If you want the sound to come out of the laptop again when you disconnect the HDMI from your TV, you have to do this again, then choose the speakers.
Cheers!

Check your ports on the lap top see if you have s video or hdmi or dvi or VGA the best is hdmi if you have that get a cable for either one of you connections also match connections from the lap top to what you have for your TV more than likely if they are both fairly new you should have hdmi connections for both get a cable that is long enough. I get my cables at amazon.com their prices are the bomb.
Connect them together both ends to lap top and to tv then make sure that you have a line in jack stereo jack with RCA ends hook that to the back of your tv and your lap top in stereo jack even better to your surround sound system. Set your TV to AVI 1 or 2 or DVI or whichever is your connection start a movie on the lap top and turn your sound on and see if you have a picture on your screen you should have the same thing as what is showing on your monitor on your lap top. Adjust settings and have fun!

yes you need to connect audio out from the tv to audio in on the dvd surround. you need the red/white phono to phono leads, simply connect together and select audio (av,au) on the input selection.

why hdmi input wont show up

Try this HDMI input with other HDMI source such as DVD, Blueray or from cable box. If it does not work as well, you need to replace mainboard.

you should be configure the display option , as extended monitor (2nd) output ,

Hi.
Connect the Home cinema and the TV with the HDMI cable. When you turn it on, first turn on the TV and then the home cinema. I hope this works.