Inverter Board Repair Explained




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David B. Vaupel: I have the very same power inverter board that you have on here & its out of a emerson lcd tv. I'm hoping this video will show me how to test my board for which the power light is flashing 15 times then goes into standby mode. Thanks! 

Troyvidihoo: There is no reply option so I will reply here to Gabriel Sorin Beldie: Perhaps youd b kind enough to point out what was condescending in my message? Having heard someone use an incorrect term, does not make it now the correct term. My response was genuinely intended to be helpful and non offensive,and thankfully was received as such. If your talking to one who knows the difference then your not going to be on the same page with whom you are trying to communicate are you? I am sorry you found my post lacking in information & objectivity, so here you go: A ballast is a complete device that by definition always steps up V & limits A, it may or may not have a true transformer or even have the output isolated from the power source like a transformer. This whole inverter device could be correctly referred to as a ballast. A transformer on the other hand is a single AC component that steps up V while stepping down A, OR viceversa, & electrically isolates source and load from each other typically. Some specialty transformers like automotive coils do not isolate input from output, but isolation is usually one of the defining characteristics of a transformer. One could occasionally be correct to call a ballast a transformer, as some ballast are simply an enclosed transformer, but most are more complex than that! So one searching for this board level part calling it a ballast, can be 99.99% certain the search will end in failure. I hope you found my contribution more beneficial now Gabriel. 

Charles McCune: America has become a throw away country. and I love it because there junk becomes my treasure. lol. nice repair.

Charles McCune: cool repair. I have a 42inch I picked up from the trash. it had be repaired before they replaced the caps. but the person that owned it said he spent like 200 bucks for that repair and not even a month later it went back again same problem so he said he threw it out and pick up a new one. so I to did the research and found it better getting a new board. but the one I had was rev A the new one I got it was a rev c looked a little different but its been working for 4 years now.

RedMusicSinging: Maybe it doesn't work for you because your a fag?? Hmm?

sinkosav: WTF is balast....that crap is used only in cars light inverters....in lcd sets is only hi voltage transformers present....they are not expensive,but hard to find...sometimes they are internally arching between coils and sometimes lcd lamps draw to much current,or even bad capacitors in power supply ...that is common failures

Donovan Lavinder: And to answer the question why the inverter will quit running when the lamp go out: The inverter is apparently required to have resistance current sensor to monitor the current the lamps draw (up to 200mA) and ensure that the lamps is kept in check. If one lamp goes bad, no matter the lamps are wired, series, parallel or both, it will always sense some change in current measurement, and shuts down to prevent arcing to the chassis. Sometimes it can go bad with lamps still working fine.

Tomta20012: what website id you say? fixyou dot com?

cal22583: @1stpickleem i havent found one on ebay in awhile. a few people have had success on Amazon. Good luck!

hermann ehon: hallo i hop this few ideal can transform my electronics life and am very interesting of it

JO3haNsum: does that make those ballast expensive?

cal22583: @DrMR2000 thanks for the tip. that's gonna very helpful for me here in the future!

jacobusonian: Hi, Don't know if you're still looking but I found a place that appears to have the ballasts. Here's a link to it Looks like links are not allowed - then you want to look up a company named Electronica-usa, using standard web addressing if you know what I'm saying. Hope it helps you or anyone else in the future.

OK2BCK: can't you just rewind those old ballasts while your wife is knitting in the armchair?

lavincilu: dear Christian, thanks a lot for your video. I want to be in ocntact with you please contact me via email please. I'm from Milano Italy my name is Luca Lavinci info@lavinci.it I've a good news for you. thanks bye

peterjordan1977: This video should be removed because it is very misleading and may even cause somebody harm if they try and play around with an inverter that has very high voltage output even at low current could be dangerous if not deadly

Kees van den Boogaart: Do you know how let the monitor give a mirror image.(not by the computer).With a CTR screen you could change some wires greetings Kees

cristoretornebiblia: Thank you buddy, this is a great video and it makes a lot of sence rather than replacing the components just get a new inverter, I did research and all kind of problems can happen on the board, fuses, capicator, they is a way to test it if you have spare led lights from another tv just plug them in and if it lights up the board is good.

Gojoe107: Thank you so much. huge help!

neighborole1: My problem is with a Viewsonic V900 or V9000. I'm so burnt out trying to find a solution to the same symptoms but the Dog-Gone Caps don't have the volcano puking out the top nor the "Jiffy POP" top. You hit a note when you pointed out the bottom droop bulge thing. Makes me want to put my binoculars on and ONCE AGAIN,,, EYE-BALL THE BOARDS AGAIN! Can the "Bottom Droop Bulge Thing" be an indicator?

chucknorris687: How did you spot an inverter problem if the the lcd flickers and is really dim? Are there common characteristics of a bad inverter? Thanks.

kcar11705: Is lcd tv the same as plasma tv?

Vicki Stromlund: Thanks so much for this video! My Emerson is having the exact same problem. I've removed the back panel, and will order the new inverter panel. Your explanation, and demonstration made this very easy to understand. Can you tell me the seller on Ebay that had the $59 panels? Thanks again.

Troyhoo: You do say your not a advanced repair person,no offense intended, What your calling ballast are usually called transformers, they almost never fail! These are step up units taking in under 12v and outputting >800v, but the current is so low that any overload usually shuts down the inverter long before they will fail. Failure can occur though if the load is open, &internal arcing occurs.Point is 99.99% likely these are not the problem Cap or semiconductor way more likely, & usually available.

worzel7: POINT TAKEN BRO BEST WISHES FROM UK

sinkosav: dont be so rude...English is not our first language,and dude you perfectly know what that guy is saying...wondering how many language you speak...and he have a good point,thats is not balasts,but hi voltage transformers...you need education in electronic dude

sinkosav: actually over time lamps loosing inert gas in it ,and draw more and more current...when current is overload ,than feedback voltage sensing is come so hi that shut down the power supply...its possible to find on what transformer is sensing voltage to high and simply disconnect transformer and shorting the input coil...then set will work ,but without one or more lamps,depending on set system,on some sets one transformer drive one lamp,on another two or more...regards

ventureelect: No apology needed , you have great videos.

Terrance Smith: Can you give me information where you got yours. I have a Sharp lc-42sb45u. I thank you in advance for any information. osmith3 deland fl

Donovan Lavinder: And yes, my TV is less than 2 years old. This TV was given to me - LCD and computer inside this TV works perfectly (confirmed with a 3+ Watts LED flashlight being shone on LCD screen, you would see patterns on it if the LCD and computer works fine).

Killpacient: obviously youre not an electronist, dude, if the windings r not shot you can tweak the feedback, its normal to drain more current over time ... its not the ballasts... usually the lamps go bad.

sinkosav: good point...that kid know nothing

Donovan Lavinder: Inverter failure can go in a long way, with so many things to go wrong: Capacitors, transistors, diodes, resistors and transformers. If you are going to troubleshoot and repair it, go at high voltage circuit as there could be failed op-amp chips in current sensor portion, which the inverter will not start due to "LAMP_OUT" fault. I have found out about this. My TV's backlight just flash then remains off. I have to replace the ICs, and maybe resistors or diodes. A real challenge.

keenedge2010: @DrMR2000 - Are you referring to the the ballasts and capacitors of the inverter board? If so, how would I know which is the inverter board on my Westinghouse LCD TV? Thanks Sonnmari83

cal22583: @ventureelect Thanks!

Felix Zavala: Great video and advise given... Thank you for the time taken sir..

Steven Brown: Compacitors !

JOHN ANTHONY: My hat is off to you for trying to recover / mend / fix this item rather than dump it in the trash. Keep up the good work bud.

certified30: why would you buy electronic componants from ebay or anywhere else, do what i do go to any electronic junk yard, pick up old electronics and desoder caps, inverters, converters...etc and have a back up of bit of everything, so when somehting goes wrong, all you have to do is dig in your reserves :) it works for me @ 0$ and i have repaired tons of TVs, monitors, motherboards...ect. dont waste your money on ebay.

ajdoms4: My LG 47 just lost power...(forgot to put power surge) what do you think is the problem on my LCD? thanks... great video...

Kevin Thomas: sup man i have a 32'' westinghouse lcd tv and frecently the screen will g blank and the sound too but the tv power will stay on it does not go in standby mode. and it wll not come back on till i rest it for about a week or so. it will work fine for ablout a month if am lucky then will go out again. what do you think?

cal22583: @huntsman1999 yeah, and this board came with a warranty too. for the amount of time saved and the peace of mind the warranty offers its a no brainer. thanks for posting!

cal22583: Non taken man. That's why I always try and tell people in my videos that I'm not a professional. Thanks man!

Marco Bernal: Thanks man, I do repairs on the side too and I had to replace a whole inverter board too, just not worth to try to fix the board.

TheGamingDirect: @kmfdmkid2000 Sames happend to me. Does it start up for 1 second then the picture goes but the sounds alright?

michael wiltz: where to buy an inverter board and how much it will cost.

whiskeyify: These are high voltage transformers...I have fixed CRT tv's for many years and I can tell you every CRT tv uses a different model high voltage transformer. There must be a thousand different ones. As to these inverters I don't know...I don't really have experience with them.

jwightsr: Picture verry weekon my Lc320EM82 S, everything else OK, have worked on early TVs and all kind of radio equipment . Could use all the help I can get

Roberto Crespo: you dont have to replace all the transformers most of the times is only one and you can find it in your local tv repair shop just buy a bad broken board and whit your hom metter find a good one

Kenneth Sloat: lol owned
Rating:
Inverter Board Repair Explained 4.3 out of 5

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