LG 42CS560-UE LCD TV turns off by itself Power Supply is New

SOURCE: LG 42PC3D-UE Turning on, clicking, then turning off & repeat

replace the power supply it is a simple fix if you can hear the relays click 2 times or more replace the power supply board you can order them from UNION Electronics ask for kyle when you call ,,if the power supply isnt the problem then it will be the control board located below the power supply board I have repaired a few of these the voltages are marked on the power sullpy board conections be careful there is a VERY HIGH AND DANGEROUS VOLTAGE FEEDING THE X AND Z BOARDS DONT REMOVE THIS WITH SET PLUGED IN IT IS HOT ENOUGH TO BURN A HOLE IN YOUR SKIN AND EVEN DO MORE DAMAGE TO YOU if your not sure what to do Call LG they have a good support theam there

Dave
Daves Tv

SOURCE: LG LCD flickers and turns itself off

I'm guessing here.. most probably its the ccfl tubes..

SOURCE: 61" plasam TV will not turn on

This is one of two problems, Bad capacitors in the power supply or your Y Sustain board has failed, I would go for the first, take the back off your tv and look for swollen or domed shaped capacitors on the power supply, They may also leak a brown liquid like substance.
Replace all that you can see and this should cure the fault.

SOURCE: 42 in LG LCD TV turns off by itself

Found that TV started switching off by itself. Would try to come on..green light blinked for 2-3 seconds, tv came on (with picture and sound) for 1 or 2 seconds and then it would turn itself off. Found that the issue is with one channel only. If you are facing this issue....try quickly changing the channel the moment it comes on. You can do it either with remote or with the TV buttons directly. also in the same logic, if this is still happening, try changing the source to another (rgb-pc, av1, av2 etc). Basically change it from whatever input it is on currently, if changing the channels does not work. My symptom was that the tv made a loud 'TIK' 'TAK' sound which is louder than normal.

Terry Dovre

• 195 Answers
• Posted on Apr 01, 2010

SOURCE: 8 month old Symphonic 20 inch lcd tv turns off itself every 3-5 seconds

these sets that shut down or turn themselves off after a few seconds usally have a bad backlite board in them. look closely at the screen and see if one section looks darker than the rest of the screen (top middle or bottom - top seems most common in my cases). some times if you put the tv on an unused input you can see the variation of light level on the screen, but don't get confussed by looking at the screen from too great of an angle. thanks ......techman 580-243-8025