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Video and sound problem with 47LF65 LG LCD TV

Hi, I got an LG 47LF65 about 5 years old but for the last few weeks the TV starts to playing around, Everyday when I turn it on the TV starts ok but after few minutes starts to appear lots of line the screen starts to flicking but after 10 - 20 if you turn it off and on few times the TV starts to work again but the problems are getting worse everyday, like today the sound stop working, I checked the volume, the mute button, the audio settings of the TV and everything seems to be ok but no TV sound, PLEASE HELP?

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

SOURCE: stripes on screen

This is just a poorly designed TV, it has thermal problems, if you notice there is room for a fan at the top, but they left it out. I have had the power supply die and I fixed it, no help from Niko. I have resolved to let this tv die when it is ready now and move on. An expensive lesson on early adoption of cheap off-brand products.

Posted on Apr 14, 2008

welcomejee
  • 10594 Answers

SOURCE: Goodmans LD3755HD Picture Problems

Let me give you Technical tip. Find "IF Block" in TV, it would be near Tuner, Open the IF Block and resold it with solder iron. make sure not to make bridges between solder points. Reason of problem in your TV is .."acostic tuning frequency drift". I dont know, how to clear my point. But I am sure, this will solve your TV's problem. Good luck.

Posted on Jul 30, 2008

  • 191 Answers

SOURCE: Goodmans LD3755HD Picture Problems

for cms voodoo, change your power module.
for tomchik, check your input voltage for voltage drop or fluctuation, if any employ voltage stabilizer, then change your power module. make sure that there is enough ventilation around your tv.
for bananahead , go and change your backlight inverter

Posted on Oct 11, 2008

  • 6 Answers

SOURCE: AWA LCD TV - Blank screen (with sound) - picture appears for a few minutes

Rplace both capacitors on inverter board along with surface mount fuse on other side of board. The caps will aapear puffy on top.

Posted on Jan 04, 2010

budmrtn
  • 11361 Answers

SOURCE: I'm having problems with my 42 inch LG LCD . when

That can be the T-CON board failure or main board. It can be heat relate so you will need freeze spray for electronics troubleshooting to cool down the T-CON board first to see if it starts working again.
You should also check the power supply first to make sure it does not have any bad caps and the DC output voltages are OK.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=LG+42LC2D
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Please leave rating if it helps.

Posted on Jan 18, 2011

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Symptoms of a Defective or dying Power supplies on LCD TVs.
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I repair these power supplies. Write to jah2mil@hotmail.com

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It should make a little noise, but if it is annoying then it is probably an issue - this is most likely the power being reduced to the inverters when the birightness is turned down. Could be a noisy coil on your power board or a capacitor may be going bad and changing value. I would look for any swollen capacitors (a bump on top, bursted or swollen sides) on the power board.

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