Question about LG 37LG30 37 in. LCD HDTV

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My LG tv don't power on...

The power cord is goog... The fuse is good...

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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. 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.

Posted on Mar 20, 2016

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Posted on Jan 02, 2017

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1 Answer

Our LG TV will not power on. No light, no sound, nothing. How can we check the fuse on the power supply? Or could it be the power cord?


Hi Dfhamilton,
Damages due to lightening surge can go to any extent in a tv set. If you can, please open the back cover and check the fuse. Replace with the same rating one if you find it blown. Switch on the set. If it works, enjoy watching. If it blows again, please consult some TV tech.
Good Luck.

Aug 17, 2015 | LG 42LE5400 42-Inch 1080p 120Hz LED LCD...

2 Answers

Tv no power


I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.4_5_2012_2_41_45_pm.jpg

Look at the power supply board inside the set (follow the power cord inside to it) for caps that look puffed up and are bad like these.

Apr 05, 2012 | LG 42LH30 42 in. LCD TV

1 Answer

My LG washer won't power up


Double check the cord to make sure all the wires are hooked up to the washer correctly, check your breaker/fuse box to make sure you don't have a tripped breaker or blown fuse, and check the outlet for power by plugging a known working item into it or using a circuit checker.

If the washer is getting power, try holding the power button down(if there is one) for 3-5 seconds.

If that doesn't help, here's a link to LG's customer support options: http://www.lg.com/us/support/contact-customer-service

Feb 09, 2012 | LG Washing Machines

1 Answer

No power even if I plug my DVD to power source


Good day.

Follow this procedure for trouble shooting.

  1. Remove the cover of your DVD player.Loosening all screw.
  2. Check the input voltage of the power supply 220v/120v AC.If don't have input supply that comes from the ac cord,replace it.
  3. If you have a input voltage supply comes from the power cord.Check the output voltage of the power supply such as 5vdc and 12vdc.
  4. If the you don't have output voltage from the power supply.Check the fuse if busted,check open/change value of capacitor,check power transistor (regulator)if shorted and leak/bulging top capacitor of the power supply board.If you found any defective parts replace it.
  5. If you have output voltage comes from the power supply.The problem could be the main board,replace it.
  6. If you already done this procedure,test it by power ON the DVD player.

I hope this information will be helpful.Thank you and good luck.

Apr 17, 2011 | LG Televison & Video

1 Answer

Have lg tv model 26ld350 and will not power on. Have checked outlet and power cord and they are ok. Does this tv have a fuse? Appreciate any assistance.


Yes,the power supply board have a fuse near the edge of the board.That the board,where the power a/c cord plug into it.

Mar 25, 2011 | LG 26LD350 26 in. TV

1 Answer

My tv wont turn on?


check your power cord for any cut wires...if it is good try to check the power supply for indication of blown fuse....its a good start for beginner if you can identify this problem...nice day..

Feb 12, 2011 | LG Televison & Video

1 Answer

My tv no power


Please check carefully your :
1. Power cord ( check the present of power at end of the cord)
2. Fuse ( Your Tv should has a safety fuse, It may blown)
3. Power supply circuit ( if none of above problem)
Note that a totally dead TV usually cause by simple thing.

Nov 20, 2010 | LG 42LC2D 42 in. LCD HDTV

1 Answer

Sony kv 35s36 won't come on at all. No click, sound, hum, buzz, nothing.


blown power supply.... I have the same tv... but with a fault in the main board leaving me with a flashing image. I have a power supply that's good and you have a main board that's probably good.....??? function SOswitchMenu() {var el = document.getElementById('bodyDiv');if ( el.style.display != "none" ) { el.style.display = 'none';}else { el.style.display = '';}var el2 = document.getElementById('h2');if ( el2.className == "calHeader goog-zippy-expanded normalText" ) { el2.className = "calHeader goog-zippy-collapsed normalText";return;}if ( el2.className == "calHeader goog-zippy-collapsed normalText" ) { el2.className = "calHeader goog-zippy-expanded normalText";return;}} function SOframeReload() {var f = document.getElementById('soFrame');f.src = f.src;}

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1 Answer

PLASMA TV PROBLEM


The problem with this set, is defective YSUS board, to avoid future same problem, you must change the following boards: YSUS, ZSUS & Control.
Verify with LG if your serial Number is included within
lots production that were recalled by this design defect

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