Not powering on

Emerson's site does not list any 72" TVs. The largest that I see is a 55" model. There are a few common locations for the buttons, though. Some models have the buttons near the center front of the TV. Sometimes these buttons are on the bottom of the bezel. A few models have the buttons on the right hand side of the TV. The Emerson LF501EM4 and LF461EM4 both have the buttons on the lower back of the TV on the right hand side as you face the TV.

If the buttons are in a horizontal line, the power button will be on the far right (when you look at the front of the TV). If the buttons are positioned vertically, the power button will be at the top.

The manuals are available from Emerson Audio Video on the product page or the support page for current models. Start at http://www.emersonaudiovideo.com/ . Funai manufactures the TVs with the Emerson name. For older TV models, try http://www.funai-corp.com/support/manuals.aspx to find the manual.

WIthout the model number of the TV, I can't give any better information about the location of the front panel control buttons. I hope that your TV has the control buttons in one of the three above locations.

Cindy Wells

Ya its the power supply board . the other guy wrote a book about old tvs talking out of his rear end.... Newer tvs are easy to fix as long as the screen isn't broken . I personally know about dynex tvs and there flaws . I repaired my 55in dynex . it was a easy cheap fix

good job christopher those capacitors are very common problem on flat screen tvs and computer monitors

Most likely, you are having power supply problems. Your tv has a specific board in it that controls the distribution of power to the tv's components. If it fails, no tv. Sometimes this happens after a power surge. Many newer lcd tvs contain power supply boards that have been manufatured with sub par capacitors on them. They were undetectable when the tvs were tested, because they work fine for a while and then deteriorate quickly. Sometimes in less than a year. Its a very common problem.

There are a few ways to fix it. That is, of coarse, if this is your problem.

1. Have it fixed by a professional.

Remember, TVs CONTAIN HIGH VOLTAGE. Do this at your own risk.

2. Open your TV and find PSB. (The board that the power cord plugs into) Check for faulty caps. If you find some (bulged or leaking) bad caps replace the entire board. The entire board can cost in the hundreds. They can be found online. I would definitely shop around though.

3. Remove and then replace individual faulty caps. You can find TV repair kits online to repair this problem but it takes some soldering skill.

Caps are inexpensive and if you can take care of it yourself it will save you hundreds.
I replaced the caps on the PSB in my Phillips TV and it worked. Here is the tip. Fixing the Philips Turns/shuts off on its own problem. I'm sure that this isn't your board but it will give you an idea of what the process is like.

Hope this helps.

Good luck and thanks for using fixya

There are two most common causes of this problem, and it's accross the board for all types of TVs: faulty electrolytic capacitors in the power board or BGA processor solder failure on the main board.

Of course there are other possibilities too, but those are the two most common ones in the order they occur.

What I'd do if I were you is to open and take a look at the power board for bulging capacitors.

Sometimes they're not on the power board - especially in small TVs like yours - but on the main board, so check there as well.

I'd be surprised if it's something else.

For a picture of bulged caps just google "bad electrolytic capacitor" or "bulged capacitor".

There are pictures in some of our blog articles too, but Internet certainly offers better ones.

Hope that helps.

www.coppelltvrepair.com

Alway check the power source first.Most common problems are for the LCD and Plasma tvs.Tvs power supply boards have dead parts on them,than not giving the right voltage to the tv anymore.The LED power light indication on the tv front panel flashes LED light or no light at all.Sometime might work for a fix or a TEM.fix buy unplug,replug the tvs back about an hour later.

This problems very common in Sharp LCD tvs.The Tuner signal board have problems,every times the power LED,OPC LED lites up,just push the power button on again,wait see if the LCD backlight lite up and works,not the Power lite and the OPC lite LEDS flashes again.You,just have to push the power button again,sometimes u have to push the power button at least 6 or 7 times to get the Power LED stable,and then LCD backlight,come on than the tv work.Not sure,but if the Power and OPC lites keep flashing,after u pushes the power button at lest 10 or 12 times,and the LCD backlight dosen't come on and the tv don't work.I think,it time to change the Tuner board is completely dead.I have a Sharp LCD tv, I do this everytimes pushing the power button at least 3 or 4 than the power LED stable,and the LCD backlight come on than the tv work.Not a plaw in the power supply like those capacitors in many LCD models tvs,but some included Sharp Tvs is the Tuner signal board is not very good in design,use the tv awhile the Tuner signal board have problems recieving the power to it Tuner board components.

There are a few common gotchas for all plasma TVs:

Most commonly, a sustain board overheats and burns out; sometimes that prevents the TV from powering and sometimes it does not.
Unfortunately I don't know enough about your particular model to tell in which category it falls.

Second, the power board either breaks too (sometimes as a result of a sustain defection) or filter capacitors on it dry out and prevent the board from powering on properly. This, in turn, is detected by the protection circuits on the power board itself and treated as a short circuit, thus shutting down the board to prevent further damage.

In my experience 80% of the time the problem you describe is caused by burned ZSUS board and 20% are due to defect power board.

As I said earlier when a sustain burns out it sometimes takes down the power as well. Which is to say do not presume that just one board has gone bad.

One of these days I am planning to post a DIY troubleshooting guide for plasma TVs at my site http://www.coppelltvrepair.com .

It's easier than many people think.

For example in your case I'd try to power off the ZSUS board - the one on the right side of the TV when you watch from the back - and turn it on again. If it powers on then the problem is in the ZSUS board.

In fact, there are quite a few such guides circulating around the net.

The problem ,of course, is that it takes time to understand and apply them properly.

Unless you have a lot of time to kill or a desire to enter the field of TV repairs it's usually better to just pay off a good technician.

Developing the qualities to find a good specialist is a challenge well worth the time and will pay many times in life.

The same can not be said very safely for the qualities of repairing plasma TVs :-)

This is very common in sharp tvs.U turn it on.U get power on light stable right?U hear a click,one or twice,sometime tv is good right?Sometime POWER light and OPC light flashes?Push the power button on/off couples times will work, picture will come on.If keep trying off/on couples time after POWER and OPC flashes,don't ever stop and never get backlight and picture.Ur Video backlight board is dead must replaced.

First, I would try leaving the TV unplugged for an hour so the TV can discharge and reset itself.
If this doesn't work, it maybe something simple like a blown fuses inside the TV that needs replacing. Radio Shack or some electronic store will carry the fuses.
If the other two ideas doesn't solve it, we're talking about a power supply board related problem. I can actually look at your TV over the internet. But, the most common problem with flat panel TVs are the power supply board for the screen itself and the main power supply board for the rest of the TV. Commonly a bad capacitor or transformer will be on the board.
If you have some electronic experience and want to repair it yourself, you can sometimes find a Service Manual for your TV over the internet. Normally, costs less than $20. It will have diagrams, schematics, and part number list for the TV.