LG tv Model 49LB5550 lost sound

The audio is distorted for your TV or the settings for the sounds have become mismatched or the speakers are speakers are not working on your TV the fans might be broken with your TV and the TV is starting to malfunction.

Hi it sounds like it has had an elctric fault like a resistor failing.
The click you heard would be a internal switch that cuts off the elctric supply to the screen to stop furthe damage hapening.
It could even be something simple like a bad solder and in that case will need locating and resoldering.
How old is the telly and how often is it used.
When you switch it off leave it off for about an hour then try again if you have allready done this then it probably is a blown resistor are you sure nothing has been pressed on controll have you tried seeing if you can acess the menu screen via the remote and see if that comes up on the screen let me know ok

It's broken!

Please check out the LED back lights strips, some of them may be defective.

If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

Recheck all your connections & be sure you have connected all cables properly, looks like you have lost sweep.

If all connections are OK, you may have gotten a defective PCB

Recheck all your connections & be sure you have connected all cables properly, looks like you have lost sweep.

If all connections are OK, you may have gotten a defective PCB

Get a DAB (digital audio converter )from maplins ('40 quid) then connect your tv using optical or coax to your dab then use RCA cable fron dab to the analogue inputs on the LG and select 'cinema' on the equaliser to get all speakers.

stupid question, but you do have an optical lead connected? the hdmi will only produce stereo sound, you must also have an optical lead (aka tos link cable) connected to produce 5.1