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Power supply problem

My LCD TV turns itself on and off every few seconds. The TV is less than 2 years old. Was told by local tv repair shop that this is typical with LCD and Plasma TV's at the 2 yr mark. Was wondering if the power supply is something i can fix or replace myself? It will cost $350 to repair. TV originally cost me $650.

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  • dlsolt Dec 22, 2007

    my 32 inch ilo lcd tv is doing the same thing -- anyone know what part i would need and where i could get it? not only that, how hard is it to open up the tv to fix it?!?

  • Formulario Feb 06, 2008

    My 2 year old approximately 60 hrs use 26 in Sharp LC-26GA5U responds to the ON buttom, brings a few stripes to the LCD, a few seconds of sound then turns itself off. Tried everything outside the set and nothing works. Can this be solved by repacing the source board or the main board? Please help.

  • dcnky Feb 29, 2008

    my 60vg825 turns on by itself for no reason. We'll come home and the tv will be on. No other problems that we know of.

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Mine did this and it was the power supply like 140 bucks from the best buy parts search

Posted on Nov 26, 2009

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Toshiba 46 inch regza yellow light blinks and picture wont come on but I have full audio


Most likely the power supply board needs to be replaced. It could also be the T-con board or less likely the display itself.

If you don't know what you're doing, DON'T OPEN THE TV UP TO FIX IT, THERE ARE HAZARDOUS VOLTAGES ON THE POWER SUPPLY BOARD, EVEN WEEKS AFTER THE TV IS UNPLUGGED!

If you don't know how to do it yourself, find some local Electronic repair shops, get quotes, try to find reviews on the shops.

Sep 21, 2016 | Toshiba Televison & Video

2 Answers

LG 42' plasma tv


Hi,
Based on the symptom it seems like you have a problem either with capacitors or mosfet ic's burned on power supply. I will open up the tv and closely inspect for any burned/damaged component. (google burned capacitors for you to have an idea on how they might look like). If you find any you can either replace the component or you could also replace the whole circuit board. The specific part number must be print out on the board itself. You need this number to order it from any part distributor.
Good Luck!
www.silvertvcomputer.com
Tv Repair Chicago Gold Coast Tv Repair West Town Tv Repair

Jun 08, 2014 | LG 42LC2D 42 in. LCD HDTV

1 Answer

We have a Westinghouse 26inch flatscreen TV, that we brought with us 3 years ago from California. It is probably 5 years old. It just died. Looking for a local TV repair shop around Bacoor, Cavite, or...


Yes,tv it is repairables,"NOT" repairable only,if tvs causes by human or object by hitting it screen only.No,if tvs are only damages are to the tvs LCD screen panel itself hitting it by an object or human the tvs,Tvs LCD screen panel itself are not repairable,most tvs,basicly are 90% of it.It is repairable,10% are not worth repairing because of the tvs beyond of the prices of the new tvs or parts are nearly impossible to buy as a refurbish components or as a whole pcb boards.Ur tv now have LED power light indication flashes or dead completely only?Yes.Power supply board are the main causes and problems.That the board where a/c power cord plug into it.U can take things aparts and put it back together basicly?Yes.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv power supply board for the replacement.Or Local tvs shops are common on ur telephone yellow pages book and internet yellow pages searches.

May 31, 2011 | Westinghouse 26" LCD Flat-Panel HDTV

2 Answers

My LG 26LH20 turns itseld off after about 2-3 seconds. TV is a little over 1 yr old. I t happened about 2 months ago and I thought it was the cable. had cable serviced, not the problem. now it's...


Tv turn itself off after 2-3 seconds the tv still audio voices?Yes,than the tv long board that call the LCD inverter board it is dead.Require change the tv long LCD inverter board,this board help the LCD screen panel to have a backlight to produced a picture or 2-3 seconds tv power died completely no power to tv all?Yes,than this problems the tv power supply board it is dying.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board or the tv power supply board for the replacement.

May 09, 2011 | LG 26LH20 LCD TV

1 Answer

I have a LG LCD TV 42LB1DR-UA for 4 years and I am going on my second power supply. Last one was replaced less than 1 year ago. LG says there has been no recall but I can not see paying $200 per year to...


I had mine for 2 years and the main board went out. Cost 650 dollars to fix. Its been less than a yr and a half and it went out again. Selling it on ebay for parts...

Aug 03, 2010 | LG 42LB1DRA 42 in. LCD Television

1 Answer

Our Trinitron KV-36XBR400 powers up then no picture


How old is this tv?More than 5 years old.Not worth it to repair CRT tv at this prices.Tries unplug,replug an hour later,might help,see if reset itself.U can buy a pretty good 32" LCD tv at $400 or less these day.It not heavy as the CRT tv,it alot easier to move the tv around the house or other locations.

Feb 25, 2010 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

Kept clicking off while watching and now won't


Most likely the TV has a power supply related problem. It's possible that it maybe a bad capacitor or transformer on the power supply board. The most common thing to go bad is the power supply for the screen. Most manufactures call it a Blacklight Inverter Board. Most TVs have a " Protection Mode ". That's when the TV detects a bad circuit board and automatically turns itself OFF so it can protect the other components inside the TV. But, I can't say which board is the problem 100% because I can't actually look at the tv over the internet. I can only make guesses with the symptoms. I'm sure it going to be a power supply related problem.

You have a few choices:

1. You can try leaving the TV unplugged for 30 - 45 minutes so the TV can discharge and reset itself.
2. If by chance the TV is still under some extented warranty by Vizio, go that route.

3. If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists.Usually, cost under $20. And most cases the new part cost less than $15.

4. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.


I hope I shed some light on the subject for you.

Jul 18, 2009 | Vizio L32 32 in. LCD HDTV

1 Answer

RED LIGHT IS ON BUT IT WILL ON TURN ON(GREEN)


Symptoms of a Defective or dying Power supplies on LCD TVs.
1. Light(s) on the front panel are behaving not normal example, blinking, amber color or not steady, fainting, etc.
2. TV not turning ON properly.
3. TV turns OFF by itself.
4. Needs to be unplug to many times to make it work.
5. Humming or high pitch noise heard through speakers or at the back of the TV.

I repair these power supplies. Write to jah2mil@hotmail.com if you require further assistance

Feb 18, 2009 | Akai LCT2715 27 in. LCD Television

5 Answers

I have a 32" HD AKAI TV that keeps turning itself off


If the service shops didn't charge people $200 to fix this I would not post.. But since they do - here's the $8 fix.

If you are electronically inclined, replace the three 1000uf 16v electrolytic capacitors in the power supply board located above the power switch. They are likely bulging out at the top and failed. They are the three in a row at the top - center of the board, located between the two black heat sinks. Make sure you get caps rated for 105c degrees! I recommend replacing them with 1000uf 25v caps. 35v caps will work but might be a tight fit as they are larger diameter.

Should cost you about $8 for the parts shipped. You can get them from partsexpress or digikey or any good local electronics store. Your local radio shack may have them but they won'y be 105c and thus may not last long.

Not handy, ask around, there is usually some electronic tweaker guy around that will install them for a few bucks.

This has solved the turns on / then off problem every time in the 3 I've done.

Oct 10, 2008 | Akai LCT3201AD 32 in. LCD Television

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