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My LG TV MOD. CF-20D16 AFTER 10 MINUTES TURNS OFF THEN THIS TIME BECOMES SHRTER I HAVE CHANGED THE Cs IN POWER SUPPLY(small size) NO EFFECT I THINK HV POWER TRASISTOR GETS HOT.YOUR SOLUTION REFERS TO

ORDINARY TV

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  • Televison & ... Master
  • 14,553 Answers

Only regular sets and older projection sets have that transistor---if you changed or had bad caps in the power supply it may be the issue.
my LG TV MOD. CF-20D16 AFTER 10 MINUTES TURNS OFF  - 10_31_2012_11_58_52_pm.jpg

Posted on Oct 31, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

mistersony
  • 320 Answers

SOURCE: Panasonic Plasma TV model TH42PD60U Shuts off power led flashes 7x

There is a software upgrade to address this particular problem. Contact Panasonic to see if the upgrade can be provided to you free of charge.

Posted on Oct 30, 2008

roety
  • 585 Answers

SOURCE: TV turns itself off, and then switches back on with no display

Hi my name is Eric,
I hope I can help you with your issue ,
Sounds like an internal TV issue , only way to know is replace the power supply brick.
There are a few boards in the Tv none that are easy to buy, I'll bet you can buy a replacment power brick on ebay for less than $30.
If you do open the Tv look for any capacitors that look bulged or swollen.
example
 
 
If you feel good about my solution please click accept.
If you have more questions post them and
I will reply asap
Thanks

Posted on Sep 14, 2009

budmrtn
  • 11361 Answers

SOURCE: 47 Inch LG HD TV -switches itself off and remain off for days

He may be right, LG is used to be called GOLD STAR, which makes junky electronic products, they changed the name to make it sounds better.
You may be able to get parts here: http://www.shopjimmy.com/catalogsearch/result/?q=LG+42LC2D+

Posted on Dec 16, 2009

itvrepair
  • 28 Answers

SOURCE: my lg plasma tv stays on standby

is you already change the power board,is possible
your y board is out...is a big board on the left side of the tv

Posted on May 19, 2010

  • 222 Answers

SOURCE: Need a new power supply. Where?

Try E-bay

Posted on Jun 06, 2010

Testimonial: "THanks."

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Lg plasma tv turns on then off after 5 minutes


Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

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Fault in the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

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Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
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hello, The best way to fix this is by opening the back cover of the television set.
The power light may be flashing or if you are runing with a series light bulb it may be cycling on and off continuously. There may be a chirping or clicking sound from inside the set. (Note: using too small a series light bulb load during testing for the size of the TV may also result in this condition.)
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