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LG42po3000az led on front lit but no power all caps are good why is it dead

ON POWER SUPPLY THERE ARE 2X HOLES WHICH LOOK AS IF THEY HAVE SOMETIME HELD A CAPACITOR IE SOLDER ROUGH

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  • LG Master
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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/
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 Dec 02, 2014

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Tech4lfe
  • 38 Answers

SOURCE: Westinghouse LTV-32w6 power light on, no video, no sound

One thing is to make sure the inverter board is unplugged when testing the voltages. A shorted inverter will shut down the power supply if the fuse dosen't blow first. There are fuses that don't look like fuses so they can be missed. The next thing would be to look for a connector from the main to power supply and see if there is a pin labeled power on or p.on or similar. The main board should turn this line high(5V) when you push the power button. If not you probably have a bad main board. Unless you can find good used boards they are both expensive. Around $200 for PS and $300 for main.

Posted on Jul 06, 2008

Twizted
  • 30 Answers

SOURCE: Power Supply Buzz

Did you use the same as original replacement capacitors? I have repaired many of these power supplies for others and never had an issue. It is possible that the failing capacitors could have caused more damage to the power supply but I have never seen it in over 50 repaired AKAI power supplies. Also, make sure you replaced the capacitors with the proper polarity.

Posted on Nov 12, 2008

javswr
  • 44 Answers

SOURCE: No Picture & No sound. Red LED, Green LED, Red LED.

If the power supply outputs are good! Then I would say the back light inverter is bad! If the screen stays black and does not come on.

Posted on Feb 28, 2009

a1electronic
  • 30 Answers

SOURCE: power supply is bad on philips plasma 50 inch tv, it just clicks

nice job... thats the most common problem with all LCD tv's now

Posted on Jul 21, 2009

  • 195 Answers

SOURCE: olevia 437-s11

Most likely the CCFL inverter has been the problem all along....

Posted on Oct 10, 2009

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I would inspect the power board for mushroomed caps and brunt traces. A edge lit led screen has two ribbon cables coming from the power supply, I would unplug one at a time to see if one side lights up. Both led strips rarely go bad at the small time. The problem is most likely in the power supply.

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If there is no LED lit on the front, it may be a blown line fuse.
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there may be some bad capacitors in the primary of the power supply. do you get any led lights the front? most polaroids will have a red led on the front if the standby supply is good. there will most likely be some smaller caps 47mf@50v 10mf@50v probably that value that are bad.

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It appears the motherboard is dead.
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Yes,the LED power lite on the front panel stable?Yes,mean the DM power supply board is good.LED power like blinking,mean the DM power supply board is dead.DM power supply is good,still making that clicking sound,when turn on.Mean ur Blast board is dead,that the board that help to light up the projection lamp.

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1 Answer

Won't turn on


The 330 series don't have an on button (they are on all the time, unless you unplug them), so presumably you are saying it is plugged in but the light is not on, the button on the front doesn't respond, and it doesn't print.

I'll assume that you have checked that the power supply is plugged in to a known working power socket and the socket is switched on if applicable (depends on country), and that you have checked the power cable is firmly plugged into the labelwriter.

Check to see if the power supply has an LED on it. If it has but it is NOT lit, and is definately plugged in then it is probably a dead power supply (or possibly a blown fuse).

In this case you can try a replacement power supply: Dymo LabelWriters (2nd item from bottom)

If the LED is lit then it would suggest that the labelwriter is broken.

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Green power LED flahingno other reponse


Now when that happened it might have fried your hard drive and motherboard. So you will need to get both of those checked out!

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