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I have a LF391EM4 A television with no power. Is there a fuse or reset button anywhere?

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Surely. There is fuse at its main power regulator [SMPS] board. But, if it should blow out, there will have a reason. 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 Apr 19, 2015

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TV humming. ordered two power boards...still not working model # LF391EM4


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. 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/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Aug 31, 2016 | Emerson Televison & Video

1 Answer

Why would we have to re program our tv channels?


If you turn the TV off by any other means than using the TV's power button you will lose the saved channels.
I think that this only applies to the first turn off after the channel scan.
In notes at right.
Emerson LC195EM87 Owner Manual Auto Channel Scan Language Selection

Oct 14, 2014 | Emerson Televison & Video

1 Answer

Emerson 40 Inch LED Flat Panel Screen Model Number LF391EM4 A Trying to utilize other media products to watch home movies & photos through USB Port on the televation screen. have no manual when bought...


First locate a manual on the Emerson site and download.
You need to change to 'input' to the TV by selecting the 'source' on the AV button.

Download from here
http://www.emersonaudiovideo.com/support/download.php

May 22, 2014 | Televison & Video

2 Answers

I have a panasonic TH-C42HD18. Last night a fuse in my fuse box flipped so I lost power to the tv. I reset the fuse (in the fuse box) but now My tv will not turn on. Everything else plugged in to that...


If you have no power light on TV ,then you must have a blowed Fuse on the power supply board.
Check Fuse and check board for Bad Capacitors they will be vented or swollen on Top.
1000uf 16v 2200uf 10v 3300uf 10v.

Jun 02, 2011 | Panasonic TH-C42HD18 42 in. Plasma TV

1 Answer

No power to my TV


Simple first. Is it on a surge strip. If so check the reset button (or fuse on some). If it has a removable power cord unplug it from the unit and test it on another device (pc or playstation depending on the type) or use a multi-meter or light tester, carefully of course. Most newer tv's do not have internal fuses or at least any that are user serviceable. If you cannot get anywhere with that you should probalby take it to a repair center. You could do serious damage taking it apart yourself.

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2 Answers

Saeco odea giro


Yes it might be the main board. but i would first try reseting the Boiler automatic fuses

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1 Answer

RCA 56 inch projection TV


six inches will just reach the bottom of the main cuircit board. Does the units green light flash? there is no reset hutton there is a fuse. but i would suspect if it got wet then something blew

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