Question about Philips Magnavox 42MF521D/37 Television

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Magnavox lcd tv 15mf050v/17

Tv shotdown after 15'' minute

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  • Anonymous Dec 12, 2007

    keep shuting off

  • anonymous206 Dec 25, 2007

    same issue. keeps shutting itself off and more frequently each time its turned back on.

  • redracer111 Dec 31, 2007

    i have the same problem.

  • Sangeetman Feb 20, 2008

    Have same problem. Shuts off after 15min.

  • Anonymous Jul 05, 2008

    I have the 15MF050V/17, bought Christmas of 2004 I think, and it just started to overheat. I am so glad to have found the solution here, but unfortunately it sounds like Greek to me. I am not electronically inclined (mechanically yes, electronically no) but if I have instructions I have friends who could help. Can anyone send me some information or link to specs? Thanks..Lisa

    earth2lisa@yahoo.com

  • Anonymous Jul 29, 2008

    shuts off after 15 minutes

  • Anonymous Dec 30, 2008

    Yep, me too, I have a : 15MF050V/17 TV and it cuts off every 5 minutes as well if it gets hot. Thanks to all for posting this fix on here I'll pull the TV apart and see if I can find those circuits that get hot. I'd rather not have to hookup a PC fan to it, but that is a possibility as the power adapter steps the voltage down to 12Volts anyway, so many computer power supplies fans use 12 volt fans also. I have thrown out most of my just computers, I guess maybe Radio shack could sell me some cheap heatsinks? Or does anyone have a site online that they would recommend for small heatsinks?



    - Brian in VA

  • Michal Leavitt
    Michal Leavitt Mar 01, 2009

    The .pdf file showing how to add heatsinks to U12 & U14 is now posted at:

    http://mysite.verizon.net/mwl777us/FixIt...

    You can download it and open it with Acrobat Reader, or open it with Reader installed as a plug-in to your web browser. Hope more of you can find it helpful.

    michalwillie

  • cowlag Apr 24, 2009

    I have/had the same problem, the heatsink fix seems to have done the trick, been running for about 4 hours no problems when before it would shutoff after 30 mins. Good work Thanks Guys/Girls...!

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I put heat-sinks on U14 and the regulator above it and the TV has been running fine all day. Always shut off after 14-30 minutes before. Heatsinks were just 1/2" x 1" metal strips with silicon thermal compound that I taped up to hold in place to temporarily test, as it is obviously a heat related problem.

If you try it and it works for you, post it here.

mwl777us@verizon.net

Posted on Jun 18, 2008

  • Michal Leavitt
    Michal Leavitt Jul 11, 2008

    I've produced a 'How To' document in .pdf format on how to add heatsinks to U12 & U14, curing my overheating problem. I can't find a way to post it here, but if you email me at mwl777us@verizon.net I will forward the file to you. I don't check email but once a week or so, but will try to keep up with it.

    MichalWillie


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I know how to fix this 100%. To find out which part to replace email m2repair@gmail.com

Posted on Jul 25, 2011

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My flat panel magnavox menu keeps popping up and want go away

Posted on Feb 02, 2009

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I put the heat sinks on my Magnavox 15MF050V/17 TV and it seams to be working fine now. I super glued them on top after testing. Thanks for the info.

Posted on Nov 08, 2008

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Got the repair info from michalwillie.  Thx very detailed repair.  I'm an electrical engr so I found it very straightforward....HOWEVER the repair did not work for me.  The unit still turns off after on for a little while.  Not sure what to do now except install fans or maybe replace U12.  Not sure its worth it, looks like to the junk pile unless someone has another suggestion.

Posted on Sep 15, 2008

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I'm having the same problem with my 15MF050V/17. It shuts off after a few minutes of use and stays on for a shorter duration as it warms up.
I've emailed Mike for the info on the heat sinks...this sounds like a Class Action Law Suit!

Posted on Sep 09, 2008

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Used pieces of an old computer heatsink and attached 2 little computer fans near the circuits and voila its still working all day now.
thanks for the advice i would have never thought of the u12 and u14 thing :-)

Posted on Sep 01, 2008

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My 15MF050V/17 Magnavox LCD TV was shutting off at about 15 minutes run time ,like clock work it shut off.Then turn it back on and it would stay on about 5 min after that . Pretty soon just a few minutes . Let it cool and the same identical cycle will repeat. Now add a fan blowing on the backside and it is still on four hours later. Maybe it is a cold weather set for eskimos in Igloos.Cannot believe they don't force a recall of these,it appears it is built right in just like the universal remote code rejection system .

Posted on Aug 09, 2008

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A 3.3v 5A regulator

Posted on Mar 02, 2008

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  • chuckyCheese Mar 02, 2008

    i have some wires solders to aic1084 (U14) and will monitor it with my digital o-scope. mine looks like it was scorched (dull black in color). chips in plastic casings look nice and shiny when new and stay that way if not overheated, just like all the other components on the board.

  • chuckyCheese Mar 02, 2008
  • chuckyCheese Mar 02, 2008

    well folks, i didnt see any problems with "U14", the AIC 3.3v regulator. voltage input was right at 5v and voltage output was steady at 3.28v during the fail time (goes on for an hour or so, then suddenly shuts itself off).



    Magnavox support line was a joke. i paid $129 for this lcd two 2.5 years ago, and support guy says "we can offere you a replacement for $167", and i pay for return shipping !! what a joke. the last time i called Magnavox the gal admitted that they were aware of the problem, but she too could only offer a replacment for $167. a replacment policy due to poor engineering should be something like "you pay shipping and we swap your unit out with a working one". they couldnt even tell me what part of the set is the problem...... obviously someone knows if they are doing swap-outs......


  • chuckyCheese Mar 02, 2008

    i forgot to ask, where did you buy your problematic LCD? i bought two from Home Depot and both have the exact same problem. the problem appeared about 1.5 years after purchase.

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U14 is a AIC104-33CM, a 3.3v 5A regulator. on my Magnavox 15MF050V/17 this regulator has a scorched look to it. regulators in plastic casing typically look shiny (as they are when new). i soldered some lead wires to the AIC pins and will monitor the voltages via my dual channel digital o-scope. if it gets too hot i suspect it's output will go too low, drop out, or simply turn off because its too hot....

Posted on Mar 02, 2008

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I beleive the problem is caused by ic number U14... I need to find out if any body has access to the service manual to find out the part number for this chip

Posted on Feb 11, 2008

I have the same problem with same TV magnavox 15mf050v/17. I have seen other cosumers with same problems on other forums.

Posted on Jan 02, 2008

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Jan 14, 2008 | Philips Magnavox 42MF521D/37 Television

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