Question about LG 37LC2D Television

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LG 37LC2D HDMI no signal (picture or sound) + crackling on audio

HDMI input worked for months but now shows "no signal" giving no picture or sound via HDMI input. Tried new cable and with SKY+HD box and HDMI laptop as the signal source but symptoms the same. Now watching SKY+ on AV3 input but this has crackling on audio since the HDMI fault, sometimes very loud crackling and also even crackles when volume on 0 or muted!

Hope someone can give some pointers before i take the back off..


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  • Ping192 Apr 29, 2010

    also tried factory reset and when scanning for channels on its re-boot it only finds the Analogue TV channels then stops at 50% not finding any DTV channels at all.. have to downpower to exit as it seems to lock up. Also locks up if manually trying to enter the menu item "station/auto program" goes to blank screen after a few seconds - cycle power to recover.

  • Ping192 Jan 17, 2011

    I have since fiixed all my problems above - check (and replace) all the electrolytic caps on the power supply board (use high temperature ones for long life) - a few of these were dried out and low in value - now perfect sound and picture again! HDMI, DTV and sound crackles all caused by these faulty PSU caps.

    hope this helps others

  • Ping192 Apr 07, 2011

    i replaced them all on the psu board as half of them had dried out.. i like my repairs to be solid! Could just swop the low reading ones tho as some are more prone than others (near heatsink or high ripple current useage) RS and Farnell have suitable replacements, but as long as they fit size-wise (some would be too big physically) and volt/uF the same or a bit more they will be ok. hope you have sucess.. this has got to be a common fault im sure..



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I have the same problem. i think they just get old, i solved the audio problem by taking the cove off the back and disconnecting the speakers, i now just use PC speakers, works grand. i haven't solved the HDMI problem yet..

Posted on Jan 17, 2011

  • 3 more comments 
  • Ping192 Jan 17, 2011

    Fixed my set now :) replaced power supply electrolytics (see above)

  • MrShameless Mar 08, 2011

    thanks PING, ill have a look at mine. great help :)

  • MrShameless Mar 08, 2011

    oh, where did you get all the right electrolytic s? :0)

  • stt9 Apr 07, 2011

    hi - i have the same problem, i checked a few of the caps and got no reading so replaced, but did you replace all of yours?

  • Ping192 Apr 07, 2011

    i replaced almost all of them.. half were very low in value. RS/Farnell do suitable hi-temperature replacements. Check physical size as some may be too big to fit space and can obv. use higher voltage types if needed for availibility.. for what it costs when u DIY this is a solid cheap repair.

    good luck fixin ur LG! :)



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