Question about LG 37LG30 37 in. LCD HDTV

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I try to turn on the TV and the power light keep blinking but it doesn't turn on, the screen remain black...

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  • LG Master
  • 14,553 Answers

The set has a problem that is likely power related===consider having a shop or a tech look at it---cannot wish it away, someone will have to open and check things to even have a chance to fix this.

Posted on Dec 03, 2012

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Posted on Jan 02, 2017

  • 8457 Answers

SOURCE: Tv turns on green light blinks three times then TV turns off

Ur power supply board is dead.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Posted on Apr 07, 2010

  • 16 Answers

SOURCE: My 32LG70 won't turn on and the screen remains blank.

Try resoldering everything back onto the power board.They become brittle sometimes.

That doesn't do it then buy a cheap cap meter off ebay for around a tenner and firstly pull off every single electrolytic then ceramic capacitor and test.

Very easy to test,look on YouTube for videos.

Replace faulty&marginal caps and your problem should be gone.Remember m8,take your time,don't rush these things.

Posted on Jun 05, 2010

Testimonial: "Thanks for the reply and corrective action, I thought it may be this issue but good to have confirmed. I'll check it out and see what happens."

  • 112 Answers

SOURCE: red/green light keeps blinking.

This issue is related to a bad/failed power supply inside your TV.

Call LG to see if your TV is still in warranty. 800-243-0000

If not in warranty, the power supply is about $225.

Good luck. I do hope that I have helped you.

Posted on Jun 28, 2010

  • 8457 Answers

SOURCE: MY LG 42" LCD TV

Tries tv unplug,replug it back like about an hour later for the tv resetting itself back to the factory setting.Tries again,tv should be working.If still getting no power at all than the tv Tuner board is dead,because pictures freezing and dies completely is the causes so it is not power supply board problems.The tv Tuner signal board is the causes,that the board where the incomming broadcasting signal cable plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.

Posted on Feb 17, 2011

  • 1156 Answers

SOURCE: I have an LG 42px5d

You might wish to unplug the TV for an hour or more. If this power reset does not allow the TV to turn on component failure is indicated. These sets are assembled using the wave soldering process they are known for having cold solder connections.

The safety circuitry shuts the TV set down or will keep it from turning on when it detects a problem. This model of TV has over 2,000 parts, which includes millions of transistors inside the integrated circuits. The capacitors will change value, leak and become defective. Resistors will change value and burn. Diodes and IC can go bad.

This may have a domino effect and cause other parts to fail. Replacing one defective part may make the TV operate for a short time but the part will fail again if the parts that caused the failure to begin with are not replaced.

The only way to know for sure which parts that are no longer within factory specs and for a proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment specifically designed for TV service and the skills to use the test equipment. I wish I could tell you there was a quick fix or button to push that would fix the TV but that is not the case or the solution needed to get the TV operating correctly.

Plasma is very common for having a power failure issue. The problem resides in the Y-Sustain board in most cases. The HDTV Plasma Television also have the same issue as they all use the same PDP Panel (plasma panel).

Loud popping and loss of power is common on plasma TVs and is usually either the Y sustain or Z sustain boards or buffers; in these instances the damaged part will be quite evident.

If this is an LCD you might have degraded insulation on one of the pink/blue backlight power leads causing high voltage to 'arc' to the chassis.

The loud bang and smell is actually to your advantage as in these circumstances the damaged part is usually evident. It'll just be a matter of popping the back off and sleuthing around

That's the sound of your power supply going bad. You will have to have it repaired by a professional television technician.


Before making any purchases, please check the part and make sure it is what your TV needs. I am simply making recommendations and trying to point you to the right direction.

Thanks for using fixya..

Posted on Aug 19, 2011

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That model is covered under a class actions lawsuit settlement over bad power supply boards. You need to contact Samsung about this and get a warranty claim started, even if the original warranty is over the settlement terms will cover parts and labor. You can get additional information about this along with contact information here: http://www.ccl-la.com/blog/index.php/samsung-has-reached-a-settlement-in-class-action-lawsuit-over-faulty-tv-power-supplies/

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Here's something that might also be useful. After you turn on the set, and get the regular red blinky lights, hold down the Device and Menu buttons together for about 5 seconds.
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