Trying to diagnose the problem with my flat screen tv. NO picture, Just sound. I have all the tools ( Solder gun, Solder, Volt meter, Etc) I also have other smaller tvs that I can gut to get parts needed to repair this one.
Kindly review the following to potentially identify the defective part
Repair Tutorial LCD TV Parts Overview Common Symptoms Solutions How...
some sites where you get parts are
TV Parts Universal TV Stands DLP Chips ShopJimmy LCD TV
Samsung TV Parts eBay
LG TV Boards Parts and Components
LCD TV Parts eBay
SOURCE: LG 42'' TV has no sound but great picture. How do I get the sound?
You shouldn't need anything plugged into the accessory jacks to get local sound from your set.
Go through the main setup menu and check audio settings; they may be set to turn off the internal speakers to send the sound to a home theatre that you apparently don't have.
Most sets have that as a selection and supply L-R audio for an external system and mute the internal speakers.
FYI: The three connectors you mention are coded as follows:
Red - right channel audio
White - left channel audio
Yellow - composite video (contains synchronization signals and video)
These may be input connectors (for external VCR/DVD decks) so check your owner's guide to verify.
SOURCE: LG Flat Screen TV has no picture, but sound
The times my TV at home has done this it is because I'm tuned to an HD source and my TV doesn't have HD. Or vice-versa, I tune to a regular channel and I have the TV set to HD.
If you have NO picture, like the channel number or volume bar don't appear, then this isn't the problem at all.
I would say check the Video (Yellow) cable in the back, or try setting up and playing a DVD and see what happens. maybe cycle through video modes, Digital etc.
If none of this helps, comment on the post and we can exchange more information.
Good luck!
SOURCE: my tv screen just went blank i still get sound but
its the motherboard. i got the same tv with cracked screen. i can sell you the motherboard for cheap or i will buy your lcd to fix mines. if interested email me at [email protected]
SOURCE: NO PICTURE LG 20LS7D LCD Flat panel TV
This is an LCD TV, which has no Y-sus or driver boards. It uses and inverter to power the back lights and the usual problem is a failed inverter board.
SOURCE: LN-R408D Samsung LCD flat screen TV
they must try to repair the smps [puff capacitors]first.then try a master reset thru the service mode.if these steps do mot solve the problem replace the t-con board on lcd panel.
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