Question about Philips Magnavox 42MF521D/37 Television

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My plasma shuts down ..

This is the second Magnavox 42MF521D/37 (replacement) in less than 6 moths!!!!! While watching news, the TV shut down & never came back on...The Philips tech was not able to solve/fix the problem for 3 moths!! Finally, Philips sends me this replacement. Now the replacement plasma started by flickering while watching... for 3 months and then finally it shut down 'dead'... never to turn on again.. Just like the first one. Anybody out there who can help...?

Mtuals
mtuals@yahoo.com


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Since it is still under warranty, it is best to get a replacement rather than attempt a DIY. I would suggest you get yourself a surge protector too..Seems like the issues you are experiencing is due to fluctuating voltages..

Hope that helps!

If your issue is not resolved, please do not assign a rating just yet. Please post back as to what steps you took, results, etc, and I will try to assist you further as best I can. I am here at your service.

P.S. -You can rate this solution with one of four votes, if you feel your issue is resolved (remember that at times a bit of to and fro dialogue may be necessary to resolve an issue).

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IrishDruid

Posted on May 05, 2008

  • Swilin Sampson
    Swilin Sampson May 31, 2008

    Hello,





    This thread has gone 14 days or more without a response.
    Please close the thread with a “FixYa” or “Helpful” rating.





    Or post back with latest developments, what steps you took,
    etc. and I will assist you further as best I can.





    Thank you.


    IrishDruid




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1 Answer

Philips Magnavox Plasma TV went off.


The red LED merely indicates that power is getting to your TV. There may have been a power supply failure, especially since your TV is a 2008 model

Jun 28, 2013 | Philips Magnavox 42MF521D/37 Television

1 Answer

I have a Magnavox 50mf231d/37 plasma tv that comes on then shuts off. no picture. when it shuts down the green led on front stays on . i tried th do a software update and thats when the shut down...


There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom (look for discoloration of the circuit board around the base of the capacitor) need to be replaced.
If you repeatedly turn it off and on, eventually it'll probably stay on, but every time you turn it off, the unit will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for some time and then try again.

If you aren't tech savvy, don't worry, read the rest of this solution and watch the videos.

If you are handy with a soldering iron and can identify the power supply and/or inverter / FM section for the backlights, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are SURE it's only doing supply output ripple filtering,
and even then, you should go OVER, not under the uF rating).

Most of the caps that go are 10V 1000uF or 3300uF.

I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.

http://www.youtube.com/watch?v=Mm51C_RDIZE
http://www.youtube.com/watch?v=BNHHrgX_6cs&feature=related
http://www.youtube.com/watch?v=8l0AUj8QUkg&NR=1&feature=fvwp
http://www.youtube.com/watch?v=Y7b_nTaZYcU&feature=related

Backlight related video here:
http://www.youtube.com/watch?v=6XoF6QZ1dmw&feature=related

As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors, amplifiers, computer power supplies and motherboards, and other electronic equipment.
The parts are cheap, and skill required is minimal.
A great parts source is Digi-Key, and you can order the parts online at www.digikey.com
They typically cost under a dollar a piece plus a flat shipping rate.
The parts usually arrive one business day later.
If you watch the third video, you will see that even someone with no soldering experience can perform these repairs as demonstrated by the woman in the video.

Aug 24, 2011 | Philips Magnavox 42MF521D/37 Television

1 Answer

I have a magnavox 42mf231d / 37 it turns on


Hi tt3nry,

Unfortunately the answer isn't a simple one on that set. Just about every board in that set can have a problem that causes it to shut down. The cheaper way out this will be a trip to the shop as opposed to you buying all the boards from a distributor and doing it yourself. A small, local shop will charge you a FAIR price and do it right for you. Plus, most distributors DO NOT WARRANT parts if you are not a professional technician.

Ask friends where they have had work done or call the local chamber of commerce. They can point you in the right direction as well. Avoid the great big places. More than a few techs means more overhead and higher prices.

Good luck.

Apr 21, 2010 | SNK Magnavox 42MF231D 42 in. Plasma TV

1 Answer

My magnavox 42in. 42MF521D-37 shut off and will not turn on


Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

Nov 14, 2009 | SNK Magnavox 42MF438B/27 42 in. LCD TV

1 Answer

My plasma screen goes black on bottom 1/2 of the screen


In most cases the lower Y-Buffer board causes this issue. Unless you know how to work on a TV it is suggested that you have a technician look at the TV and repair it for you.

Nov 05, 2009 | Philips Magnavox 42MF521D/37 Television

1 Answer

My tv picture is light and hard to see and will periodically shut off.its only abput 5 yrs old/


For a Philips LCD TV, that's at least two years longer than they typically last. The most common problem with Philps TVs is the power supply board, which could cause the TV to shut-down by itself. The picture being too-light could happen for several reasons. In general, a repair shop needs to figure out what's wrong.

Nov 02, 2009 | Philips Magnavox 42MF521D/37 Television

1 Answer

42' plasma magnavox model # 42MF230A has no picture and no sound


I had the same problem with an Insignia 42" 1080p. Turn off the tv power and disconnect all cables (i started with power cable, then HD cables then HDMI). Wait 30 seconds with nothing plugged in, then I plugged everything back in (in reverse order) and it works fine.

Oct 04, 2009 | Philips Magnavox 42MF521D/37 Television

1 Answer

42pf9956/37 philps plasma


I don't know why but this got my TV on.
I took off the back cover and found the source of the clicking.
Two blue plastic rectangular relays in the exact middle.
When I pushed the power button, I felt the top relay click, and I saw a flash from the bottom one. (they are right next to each other)
I took a hair dryer and placed it over the two relays for about 1 minute and tried the power.
It clicked only 4 times and then came on!!!!!!!!!
For some reason heat helps the relay.
If anyone is a tech and can explain this, please do.
Good luck!!!!
My tv is on and it didn't cost me anything.
I just can't turn it off now!!!

Sep 25, 2007 | Philips Magnavox 42MF521D/37 Television

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