green power light on picture flashes on for split sec then goes black, sound still works on my 37 in lg,
visibly all capacitors, and other components look normal, have taken no readings
Hello and welcome to JustAnswer! I am Pete, a TV expert, and I'm happy to assist with your question today.
Can you please let me know:1. The full model number of your LG TV?2. Approximately how old is it?3. Is there a glow from the black screen if viewed in a dark room?4. What is your level of experience in TV or electronic repairs?
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manufactured in oct 08
the back glow comes on w picture and off w picture almost immediatley
i have 0 experience but not stupid either,can solder and what not
Hi Matt,If you have sound but no picture, and the backlight only comes on briefly, then the most likely cause of this is a fault with the backlight inverter board.This board provides the power to the backlight, and faulty capacitors on the inverter board commonly cause this problem.If you have visually checked the capacitors on the inverter board and they appear ok, they may still be faulty, or a different component may be faulty or there could be some dry solder joints.If you have the schematics and test equipment available you can carry out some checks on the inverter board to find where the fault lies.If you want to replace the inverter board, it is a straightforward swap. The inverter board for your LG set is actually manufactured by Sony and the part number is XXXXX It normally costs around $50 however they are available on the following website for $36:http://www.shopjimmy.com/sony-1-857-211-11-backlight-inverter.htm
12+ years experience installing and repairing electronics.
Hello, well i ordered the board this is not the problem, i am getting the same action, flash on and then black
I bought this and still having same problems
Relist: Other.ive asked several times and still no answert
Thanks for the question. My name is XXX, XXX I'm sorry to hear about your TV. I'm also sorry to see your expert isn't responding. I'll do my best to help you.Do you ever get a picture on the TV, even briefly?Best,Dan
Thanks Dan, yes for about three seconds then black, sound stays on
When the screen is black, press MENU on the original remote (not the cable remote). Does the menu come on screen?Also, dim the room and turn the TV on. Determine whether or not the backlights are on. If they're on, the screen will lighten up very slightly, from pitch black to a very dark gray almost like the screen it glowing.Dan
there is no glow, the menu does not come up but i can clearly see pic for three or fou seconds. Ive replaced the backlight inverter board and the some thing happens
Ok, thank you. Is there 24VDC going from the power supply circuit board to the inverter?
i will have to check tools not here right now can i reply tomorrow?