Have video but no audio on lg 42 lcd, simplink not working

Go into you menu and options and turn off simplink.

LG 42LS5700 - LG.com

www.lg.com > Home > Support > Product Support

LG ElectronicsTV/Audio/Video; TVs; 42LS5700 ... TV Support Landing Page - HDTV/Netcast/webOS 1.0/webOS 2.0 ... Adjusting Picture Settings - webOS 2.0 Video ... quality and convenience of complimentary shipping when buying directly from LG.com. ... Curved TVs · 22 Inch to 29 Inch Class TVs · 32 Inch to 39 Inch Class TVs · 40 Inch ...

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Simplink is used only with two or more LG deveces connected together via Hdmi
To use it you should first of all turnit on
you go to option and select simplink on or you just press from your remocon the simplink button and then select on
After this when you press the simplink butto to your remocon
a new menu with your connected devices pop upwith new selections to use

the problem on this tv is the power supply , you have bad capacitors on the power supply

This is a manual that should help you, it may even be your model but, it shows hook ups and has a page about the Simplink:
http://www.lg.com/us/support/product/support-product-profile.jsp?customerModelCode=37LH30&matchedModelCode=1000009240&searchEngineModelCode=37LH30&initialTab=documents&targetPage=support-product-profile#
Scroll down to manual, ckick on the one you want, and open. Typically, you would want to hook all video related units directly to TV, via HDMi, Component, RCA, etc., with the componenet video, you have to also have an audio cable, because the componenet does not carry sound. In other words, you want to hook things like, cable/sat box, DVR, etc., directly to TV then, use your digital optical out from tv to digital optical in on your home theater. You use your TV's menu to select what you are watching and you only have to use the one input setting on receiver to listen to all. If you try to route you units through the home theater system first, you may not get the best results and you may expierience lags between the video and audio.

Make sure you have a working phone cable plugged into the back of your unit so it can dial out.

That is the correct function of the SIMPLINK.
If you look at the bottom of the page of #44 in your user LG TV manual, you can read about the SIMPLINK issue.
“When you select a device with a home theater functionality, the sound output automatically switches to the home theater speakers.
You can turn off the SIMPLINK function to stop this issue. Go to "Menu", select the white "Toolbox", and look down and you will see the SIMPLINK to change its ON/OFF option.
Good Luck.

I am currently having the same problem, there is a setting (which I have not found again yet) to change into a mode to enable quiet startup, so you dont accidentally turn devices on when their volume is up loud, I believe this could be the cause but as I said I am still looking for that setting! Constantly have to keep changing speaker output in Simplink every switch on

OK. For all you regular Joe's like me here's the fix--plain and simple! I have Dish Networks HD receiver, an LG Home Theater System (LHB953) and an LG HD Television - although I suspect this applies for most LG TV-to-LG Audio Systems used in combination with a HD TV). My problem lied within the LG to LG setting known as SIMPLINK which tries to "auto-configure" everything between LG to LG devices.

Do this to make your HD TV (using Dish/DirecTV) play it's HD video display from the satellite provider but play the audio over the LG surround sound speakers:

1. Plug a HDMI cable from your satelite receiver's set-top-box to your HD TV. This will carry your HD "video" ONLY. Click "Input" on the TV remote until the HD video signal shows your desired TV channel from your satellite provider.

2. Plug an HD Optical cable (the one with the red laser) from your LG HTS (Home Theater System) to your satellite box. This will carry your HD "audio" ONLY.

3. This is the magic everyone seems to be overlooking. On the LG TV remote, go into the menu options and disable SIMPLINK by setting SIMPLINK=OFF. This feature allows the video and audio signals to be split over 2 different ports: HD video goes over the HDMI cable and the audio to go over the HD Optical cable.

Hope this helps!
Scott C.

how do you turn Simplink off?