Question about LG 42LC7D-UB Television
After few minutes the sound goes off and channel change by itself , there is no way to turn volume back up, or stop the channel change other than turn off the TV for a while.
When heats up, the supply voltage from the main power supply board goes less. Check all the soldering to this board for any loose solder terminals. Resolder all the suspected solder terminals by applying a little more solder. If it do not help you, replace the board as card basis.
Posted on Jan 09, 2013
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Posted on Jan 02, 2017
There are some inductors that are out of spec. LG's original SB said to replace some of these with a jumper, but it only lasted a couple months.
You need to have the Total Main Assy replaced.
Posted on Jul 30, 2008
1- check all the cables that are hooked up to the TV 2- try to get audio to and external speakers or home theater (to check the sound card). 3- if the step # 2 don't work either you have a bad sound board on your TV. 4- opn the TV try t get the part # of the board, and replace it
Posted on Feb 20, 2010
The power on problem is a cap in the power on circuit. The loss of signal for an areal is delayed. Nothing you can for DIY.It needs repair shop visit.
Posted on Feb 12, 2011
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