That problem is usually cause of faulty T-con board..
thats pretty normal, it takes a good second or two to warm up and the display to turn on(at least0, you get the green flashes as you hold for on, 1 sec is a long time at times, lol, be patient, no problem with your tv!
SOURCE: LG 42 TV powers up for only a second then goes back out.
Undo the back and see if the fuses are blown. Replace them if they are.
SOURCE: i have an lg 32lb9d that wont turn on. the green
You need to replace some bad capacitors on your power supply. Easy fix and you can do it yourself for less than $15 parts. I order mine from Digi-Key. Check out some videos on youtube for plasma and lcd repair.
You will need to identify which capacitors are bad on your power supply and order ones with same same ratings (micorfarads, volts, temp and actual size).
Good luck
SOURCE: power light is flashing green. i hold the power
Sharp tv are famous for this problems.Take ur tv aparts,where the a/c power cord go into it.That ur tv power supply board,check for all those dead leakage capacitors parts that bulges up on it top or puff up on it top.Than it ur power supply board,replaced those dead leakages capicitors or replaced the whole power supply board.No leakage capcitors on the power supply board.Than it 100% the Tuner board it dead,this board is where the coalax broacast tv signal cable go into it.This board can't not be repair only replaced,because it alway some ICS it the problems it dead on this Tuner board.Tries websties like Shopjimmy.com,Ebay.com to buy either or both refurbishes the power supply board or the Tuner board.
SOURCE: i have an lg 32lb9d that wont turn on. the green
good day maybe the main board has a defect,contact a lg qualified technician to solve your problem
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