Question about Philips Magnavox 42MF521D/37 Television

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My Tv model number 42mf521d/37 will not turn on and makes a high pitched alarm. What is the deal. Do I need a preist? lol

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Is the TV's name Damien??
I think it's the main power supply. This happens far too often on new sets.
Find a decent TV repair place near you

Posted on Oct 11, 2010

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Squealing sound on magnavox tv


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May 15, 2012 | Philips Magnavox 42MF521D/37 Television

1 Answer

My 42MF521D/37 has been great for about 4 years, but the other day it shut off on its own and will not turn on again. My mother in law is staying with us and she had it on for three days straight when it...


The TV is running 24/7 even when you turn it off, it is because the power supply and the processor has to be running so it will turn on the rest of the circuits when it gets the command from the remote or from the power switch on the TV.
More likely the power supply had died.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

Mar 03, 2011 | Philips Magnavox 42MF521D/37 Television

1 Answer

Need codes


I have old model portable tv.Has perfect picture.But, cannot find a remote cotrol or code compatible to make it change channels or adjust the volume..Phillips Brand Model PR0920X101

Sep 13, 2010 | Philips Magnavox 42MF521D/37 Television

1 Answer

I have a 37 in HD Magnavox lcd television - 1-1/2 years old - It takes several tries to turn it on. Is this something I can fix myself like from using an electronic cleaner? (I live rurally so I have...


This is the power supply board problems.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.Or take the power supply board apart's,check for those capacitors parts are dying,alway bulges up it tops or puffing up on it tops.U have tools and kmow basic electronic and soldering.Replaced these dying capacitors,tv should come on right away.Use a cooling fan,turn it on high,put close to it.All the dust and particles.Will blown out.

Aug 08, 2010 | Philips Magnavox 42MF521D/37 Television

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