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Anonymous Posted on Dec 11, 2013

LG 42LW450U Will not switch on

My tv will not switch on. Green light coes and then clicks and goes off again

1 Answer

Nigel Wirdnam

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  • Posted on Oct 17, 2019
Nigel Wirdnam
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As said, take the back off (loads of screws) check capacitors on power board for bulging/leaking & replace as necessary. My fault wasn't capacitors on the power board but was a small component on the main board, the one with the scart & hdmi sockets on it, (surface mount inductor L407) that is really tiny & sits just next to the main board power connector under a bit of adhesive. You can check this by pressing a fine screwdriver tip on the joint & see if the TV powers up. Mine was caused by a Dry joint /crack in joint & just needed a very fine tipped soldering iron at 350c to reflow the joint. You'll need a jewellers loupe to see it & carefully solder it though.

5 Related Answers

Anonymous

  • 3614 Answers
  • Posted on Aug 08, 2008

SOURCE: LG Flat Screen Problem

since when have you experienced the problem? does the tv still turn on or not...?

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Anonymous

  • 131 Answers
  • Posted on Apr 05, 2010

SOURCE: LG 60PC1D making clicking sounds

Hi
A common problem for these is bad capacitors in the power supply, Remove the back from your Tv and look at the power supply on the left hand side.

You will see roughly around 9 x capacitors that are bulged / domed shaped on top usually these are valued at 3300uf 10V any that have bulged or leaked a brown like substance should be changed.
This will cure the problem as they overheat being sat next to a heatsink that gets very hot!
Try and change them for the same 3300uf but a higher voltage.
Hope this helps
Please rate my reply ++++

Anonymous

  • 679 Answers
  • Posted on Feb 03, 2011

SOURCE: I have a LG 42PB4D Plasma TV. For no known reason

You just need to replace the power supply board.Have it service by a TV technician to replace it for you Its a common issue for this types of TV. Thanks

Anonymous

  • 96 Answers
  • Posted on Jun 04, 2012

SOURCE: LG 47LG50 dead....no red light, no blue light, no green light. It made a CLICK sound and went dead. Power Supply?

may be power supply need more information

Anonymous

  • 14553 Answers
  • Posted on Jun 26, 2012

SOURCE: my lg plasma tv 50pq60d wont switch on ... standby lights goes off makes a click but nothing in minute or so it goes back to the red standby light ..

Set is in protective shutdown--best thing is to take to a shop and get an estimate.

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