Question about Philips Magnavox 42MF521D/37 Television
Tv shotdown after 15'' minute
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.
Posted on Jun 18, 2008
My flat panel magnavox menu keeps popping up and want go away
Posted on Feb 02, 2009
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
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
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
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
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
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
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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Posted on Jan 02, 2017
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