Question about Emerson LC391EM3 39 in. LCD HDTV

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Replaced power Supply Board LC391EM3 LCD TV. It still won't power up.

Is there another fixable solution

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Posted on Jan 02, 2017

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caroldon
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SOURCE: 32 inch lcd tv wont power on,replaced power board

If the failure was due to some heavy voltage crisis or thunderstorm then it may sometimes go beyond the scope of our forum but not to worrry you must be familiar to test voltage of +B, sub voltages , the power to the processor, check for shorts, look out for burnt components..... overall check carefully with a flow chart elimination... attempt only if familiar or else take help with these views for an estimation.. ask for the exact fault and check for the replaced item.... hope you get this right.

Posted on Jul 01, 2010

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1 Answer

What part needs to be replaced when your tv takes a surge and does not power up just sounds like a whistle


the whistle is the crowbar action in the power supply as it detects an error it slams that current into a coil an shuts.
try isolating the power supply pull all connectors
if nothing happens no whistle then either its external board or one of them gives it feed back to allow it to turn on . best can do.

Aug 03, 2014 | Emerson LC391EM3 39 in. LCD HDTV

1 Answer

Where is the protecter fuse on a lc391em3


The fuse is located on the switched mode power supply board.

Apr 27, 2014 | Emerson LC391EM3 39 in. LCD HDTV

1 Answer

Where is the reset or fuse on the lc391eme tv


The fuse is located on switched mode power supply board. If the fuse has blown the set will be dead no standby led light on front of set also when you plug the set into a power outlet you should hear the relays clicking. if you don't hear the clicking then the fuse has blown or another part of the power supply has failed and will require service.

Apr 27, 2014 | Emerson LC391EM3 39 in. LCD HDTV

1 Answer

Tv dead. high-pitched whine when plugged-in.


Sounds like the back-light inverter board has damaged. Check it.

May 21, 2013 | Emerson LC391EM3 39 in. LCD HDTV

1 Answer

We have a 46 inch sharp tv model number 46SB54U won't turn on. The green timer light is flashing. We just replaced the power supply board thinking that was the problem. TV still won't turn on...


Hello,

Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

I hope this will helpout ......

Jun 25, 2011 | Sharp LC46SB54U 46 in. LCD TV

2 Answers

Spot of bad weather here, just had a power surge in the house and now our tv (sharp lc-42SB48UT) won't power on. There is no blue or red light on the front and changing outlets/surge protectors doesn't...


90% to 95% ur tv have a dead power supply board only.5% ur tv could have both dead boards the tv power supply board and the main tv Tuner signal board too.The tv power supply board.That the board,where the power a/c cord plug into it.The tv main Tuner signal board,that the board where all the exstented devices and the tv incomming broadcasting signal cable wire plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement first.The tv problems should be fixed.If not than the main tv Tuner signal board is dead too.Must be replaced also.

Apr 24, 2011 | Sharp LC42SB48UT 42 in. LCD TV

1 Answer

When i turn the power on the tv clicks for up to ten min before the picture comes on. is this fixable?


Yes,very fixables.Ur tv power suppply board have these parts call capacitors.They are dead and gases leakages,not total,but dying.These capacitors they alway bulges up on it top,puff up on it top,these capacitors are dying,that why tv still have power but it take up to ten min. clicking to recieve power to the rest of the tv.The power supply board,that the board where the power a/c cord plug into it.U have basic understanding of electronic's?U have tools,soldering iron,desoldering pump,solders?Take the tv aparts.U just looking,searches all around the power supply board and replaced these dead,dying capacitors that are bulges,puff up on it tops.Replaced these gases leakages capacitors,ur tv will have it power back to normal and work on the first click.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Jun 04, 2010 | Samsung LA40A450 40 in. LCD TV

1 Answer

52'' Sony Bravia will not turn on


Hi,
Its fixable problem like power supply board replacement will solve the problem.
Unplug tv from wall socket for couple of minutes, replug back in and turn it On.
If problem still exist then most likely power supply got fired and will be replaced, local tv repair shop will help you to replace power supply board.
Thanks.

May 02, 2010 | Sony BRAVIA KDL-52S4100 52 in. HDTV LCD

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