Question about Emerson 22" Class LED-LCD 720p 60Hz HDTV, 2.1" ultra-slim LE220EM3

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IT WAS PLUG INTO WRONG CURRENT ....AND ECAUSE OF THAT THE BOARD INSIDE OF THE TV THAT ALLOW TO SHOW IT CHANNNEL IS NOT WORKING

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If set got connected to wrong power one or more parts in the power supply are damaged and or bad.

Have a look if able to get it safely apart--follow power cord to power board in the set--look for burnt parts or puffed up caps.
IT WAS PLUG INTO WRONG CURRENT ....AND E - 11_7_2012_2_29_43_pm.jpg11_7_2012_2_30_04_pm.jpg

Posted on Nov 07, 2012

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My lg tv keeps turning off & on


First of all, thank you very much for choosing FIXYA today for your technical support needs.



Often times this symptom is the result of a failing power supply circuit in your TV, although there are certainly a number of other possible causes.


If your warranty is still valid, then you should definitely contact your dealer / place of purchase and arrange for a refund, exchange, or no cost repair service. If the already warranty is expired, then you have other options available as well.




One fairly easy way to troubleshoot this symptom yourself is to first unplug the set, and then remove the rear access panel on the TV to check the power supply circuit board located inside. Look for any scorched / bulging / leaking electrolytic capacitors on that circuit board. If you see any evidence of this, then you might want to consider replacing the power supply circuit board with a new one, since this is the most often the source of the trouble.



Here are some links to images which show what faulty capacitors often look like:



http://www.facilitateit.com.au/Capacitors.htm




http://www.pctips.org.uk/html/problems.html#Plague



You can usually find replacement circuit boards online by searching for your TV's model number.

Here is a link to a replacement POWER SUPPLY BOARD for your LG model 32LG30 TV currently available on Ebay for about $59 US plus shipping:



http://www.ebay.com/itm/LG-TV-32LG3DC-UA-32LG30DC-UA-Power-Board-EAY40504401-/120732123528?pt=LH_DefaultDomain_0&hash=item1c1c320188




Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information and items at the website indicated.



The repair / replacement procedure is not extremely difficult if you have some basic electrical safety knowledge and some basic electronics / mechanical repair skills.



You will need to first unplug the power cord from the unit, lay the TV screen side down on something soft and flat like a bed if necessary, and then remove the rear access panel or the entire rear cover as required in order to access the circuit boards inside.



When you remove the rear cover and access the circuit boards inside, just check the part number that is printed right on your currently fitted circuit board, and confirm that it exactly matches the one provided in the online listing. Also make sure that any part you order is labelled "TESTED WORKING" in the condition description. Any part with a condition description of "AS IS" is probably faulty as well.



Then just unclip and remove the various electrical wire connectors leading to the power supply circuit board. Then remove the screws securing the circuit board to the TV frame and then remove the power supply circuit board itself. Be sure to avoid touching any large capacitors on the circuit board which can retain a nasty electrical charge and still cause injury even after the unit is unplugged.



Then just screw in the new power supply circuit board and connect all the wire bundles to their appropriate connectors on the new circuit board and then replace the rear cover. Then plug in the power cord and test out your TV.



If you are not comfortable conducting this level of repair procedure yourself, then you will probably need to contact your local TV repair shop to arrange for service.


I hope that was helpful to you, good luck.



Joe.

Oct 10, 2011 | LG 32LG30 32 in. LCD HDTV

1 Answer

What's your problem?Won't stop changing channels


Hello,

there is every possibility that the channel (ch - and ch +) button on the TV is stuck. This can make the TV channels change by itself. This also applies to the remote control (if any).

Turn off the TV, use your thumb to flip through the channel (ch - and ch +) button on the TV. This will free the stuck button. Also, check the channel (ch - and ch +) buttons on the remove and make sure it is also not stuck in.

If the above doesn't solve the problem, then it means fault is from the control board inside the TV. It maybe defective or needs servicing.

The board controls the buttons on the TV and it can be found on the position of the channel (ch - and ch +) inside the TV.

Note that TV stores a lot of current. So if you want to disassemble the TV to check the board allow the current to discharge by remove the TV plug from the wall and wait for about 1 hour before attempting to disassemble the TV.

Let me know if you need more assistance...

Regards.

Sep 27, 2011 | RCA HD61LPW42 61" Rear Projection HDTV

3 Answers

I HAVE A 50 HITACHI TV THAT WAS GIVEN TO ME WITH NO POWER PLUG OR REMOTE ,I BOUGHT A POWER PLUG ,PLUGGED IT IN ,YET NOTHING HAPPEN. DO I NEED THE REMOTE TO OPERATE THE ON AND OFF POWER OF THIS TV?


Hello,
The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.
The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.
All these can be checked on the power supply board.
But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.
The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)
You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.
What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).
You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.
Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.
If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.
I hope this helps.
Regards.

Jul 11, 2011 | Hitachi P50H401 50 in. Plasma HDTV

2 Answers

After a lightning storm, my TV will not turn on. Is there a fuse or something on the in coming power that may have blown causing it not to turn on?


Any TV subjected to a power surge will have problems. If you can remove the back cover, do so. Locate the glass fuse. In the best situations the fuse is clear and opened, and replacement will repair your TV. In worst cases the fuse may be blackened, and you will see that many components are burned and shattered. If this latter is true, only replacing the TV is your best bet. In many cases electronics may be connected to surge protectors, but lightning will over ride these devices and cause damage. I have seen this happen many times.Thanks for asking and show all hands of support!

Jun 23, 2011 | Sanyo AVM-3659S 36" TV

1 Answer

Tv will not even show red led when plugged in. worked fine til power outage. not fuse, tried that. problem?


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Mar 23, 2011 | Polaroid FLM-3732 Television

1 Answer

Blew fuse, replaced it,turned it on and fuse blew.... options?


There is something wrong inside that is causing the fuse to blow. The fuse is the first defense in protecting the rest of the TV. The internal voltage regulator could be bad which is causing the internal power adapter to send too much voltage and current to the rest of the tv. The fuse responds to current going through it than what it is rated for.

With that in mind be sure to not stick in a bigger fuse as it could cause the tv to work for a while until something else gets damaged or the tv smokes.

Jan 02, 2010 | Olevia LT32HVM 32 in. LCD Television

1 Answer

Got an rca 32v434t, plugged in hooked up, and it


we would need more information:

has TV worked before
how many hours has TV been used

I have seen this 'ShutDown' on many failing monitors..


Typicaly the Power Supply circuit in your TV
have 'Over Current' detection\protection
and your 10 second is just about how long somthing is probly taking to either:

over current and shut down
or more specifically:

one or both things wrong with it:

bad electrolytic capacitors ( maybe )
but if it's a perfect picture for all 10 seconds then probobly some specific semiconductor or module is: 'Heating Up' then 'OverTemperature' and failing in a manner that causes an immediate overcurrent condition, shutting off the TV.


- give more information

- if capable of safely removing the back of the TV to allow for inspection...
,
WITHOUT GETTING ELECTROCUTED
by the high voltage that remains stored inside the tube, even after power has been removed !
,
then pop her open and have a look at
the PCB's ( circuit boards )

if somthing has been running hot and has led to this type of failure; then your circuit board will be discolored near the mounting of that device... You may even notice a burnt pcb smell at that area.

anyhow

somtimes you can find these semiconductors or modules in catalogs or online ( OfCourse )

and yourself or sombody with sufficient knowledge of soldering and the
' Potentially Life Threatening Hazzardes '
that exist around CRT monitor repair....

... can go ahead ad replace the suspect part.


Ed

Jun 16, 2009 | RCA 32V420T 32" TV

1 Answer

NO POWER AT POWER SUPPLY BOARD EVEN AFTER REPLACING FUSE.


If the mains cord has only 2 pin plug, you can plug it the other way to see if the mains cord has an open circuit at one of the wires. It is not uncommon to find open circuited mains cord for a large appliance like a TV. The degaussing circuit causes a surge in current consumption when you switch on the TV from cold.

Mar 14, 2009 | RCA P52926 52" Rear Projection Television

1 Answer

Television won't turn on. The standby light is out and the tv is just dead


Check the outlet. If you plug a lamp into the same outlet and it doesn't work, you have no power there (reset the circuit breaker or call an electrician).

If the lamp does work, look for a circuit breaker on the back of the TV - it's usually a red or brown rod (about half as thick as a pencil and less than an inch long) sticking out. Press it in. If that fixes it, fine. If it keeps happening, take it to a repair shop - something is wrong inside an, since it's plugged into the wall (lots of electricity available), it could cause a fire.

If there's power to the outlet and no circuit breaker (or pushing it in doesn't help) you'll need a repair shop. (With the current repair prices and the current prices for TV sets, it may be cheaper to buy a new one. Shop around.)

Aug 19, 2008 | Televison & Video

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