Question about Toymax Magnavox 37MF231D 37 in. LCD TV

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Magnavox 37" model 37mf231d-37 wont tun on when i hit power button the screen lights up for a secongd and turns right back to black and the power button green light comes on and right back off I found

Push powe butoon and green light comes on along with tv lights up and both the green light and the screen turn right back off

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  • Toymax Master
  • 1,210 Answers

Your power supply is weak. If you think you can repair this I will tell you how. If you cannot do this,find someone who works electronics and share this repair. Two capacitors are bad. When pulling the back cover off, you may see one or two capacitors bulged. Even if they look good....replace these capacitors. The locations are numbered and, the capacitor having a value and temperature of 105 degrees.. Location of the first capacitor is 2074, value 25volts @ 2200 mf @ 105 degrees and will most certainly be bulged. The next capacitor may look fine....replace it. That capacitor location is 2066, value is 35 volts @ 1200mf @ 105 degrees. When you replace these, please be sure to get the polarity (positive leg and negative leg) of these capacitors seated correctly...this is a must. This will correct your TV. You will save lots of money, because you asked. Thanks for listening ..good luck...we will be here for your next repair.

Posted on Feb 08, 2013

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Posted on Jan 02, 2017

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  • 70 Answers

SOURCE: Philips Magnavox 37" LCD Flat

Disconnect the LVDS Cable that runs from the small signal board to the display panel and apply power,if the screen comes on,the Small signal board (aka Scaler Bd ) is the faulty board. other than that,all that's really left that has gone bad for me is the logic board.

Posted on Jul 07, 2009

  • 18 Answers

SOURCE: Magnavox lcd tv not turning on

Also changed swollen C2074 and C2081 and it now works perfectly! a bit daunting for a novice like myself but with a steady hand and decent 'put it back the way you took it apart' skills, all went well!

Posted on Jul 28, 2009

  • 2 Answers

SOURCE: Magnavox 32mf231d - Just a blinking green light, No Power

I had this problem, but saw other places that it was a cheesy capacitor on the power supply circuit board causing this. I opened it up and took the power supply board out and it was obvious which capacitor was bad...top was bulging and had black stuff on it. It was rated 2200 uF @ 25V...got a new one @ Radio Shack that was 2200 uF @ 35v. Soldered it in (I stink @ soldering, but gave it a shot and it was EZ). Watching the first weekend of college football w/o waiting on a flashing green light for up to an hour so the TV would start! I'm going to try to find the other websites that directed me to this to say THANK YOU...BTW my brother used to have fits with several Magnovox TV's and thier power supplies back in the old tube style TV days. I thought I didn't need to worry about this with an HD flatscreen, but was wrong. I will think twice before buying a Phillips/Magnavox/Funai/whatever else they are again. They have a long list of complaints and I believe a class action lawsuit to refer to about this problem. They should have stepped up and done something!

Posted on Sep 05, 2009

maatmartin7
  • 1210 Answers

SOURCE: Have a Magnavox 37mf321d LCD TV, one day, went to

Although a capacitor may look good, it may be weak or bad. Here is what you will have to do. Replace capacitor (location) 2074 which is a 25 volt 2200Mf at 105 degrees. Replace capacitor (location) 2081 which is a 35 volt 1200 Mf at 105 degrees. And you should change capacitor 2066 which is a 16 volt 10Mf at 105 degrees. Please be careful with the last cap mentioned. You can easily tear the PCB trace if you are not extremely careful. This should bring your TV back to life. Thanks for asking and show a few hands of support!

Posted on Dec 25, 2010

  • 3 Answers

SOURCE: I have a magnavox flat screen 37 inch 37mf231d/37

the problem is the picture board replace it

Posted on Jan 27, 2011

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Replace cap location 2074 which is 25 volt 2200Mf and cap location 2081 which is 35 volt 1200Mf. You can visually see these when you remove the back...Good Luck! PS...be sure they are rated at 105 degrees!!!!

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http://en.wikipedia.org/wiki/Capacitor_plague
Please

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Also changed swollen C2074 and C2081 and it now works perfectly! a bit daunting for a novice like myself but with a steady hand and decent 'put it back the way you took it apart' skills, all went well!

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