Question about Philips Magnavox 27MS343S 27" TV

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Magnavox: 37MF231D/331D/321D Haven't even had this TV for 2 yrs. When it gets turned off it will not turn back on. Keeps turning itself off. In the past have been able to play with for an hour or so to get it back on but now will not come back on. Green blinks for a while then goes off.

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  • whip480vac Jul 05, 2008

    Like Kellijack our magnavox: 37MF231D/331D/321D suffers from the same problem. When the set is turned off and left off for a long period of time we press the power on button and wait while the green power light flickers and acts as if the tv is looking for a signal and finally the light goes out. We then hit the power on button again and the period of time that the green light flickers is only 5 to 10 seconds as conpared to the initial power on flicker being upwards of 10 minutes. After the third or fourth time pressing the power on button the tv comes on and plays just fine. If we turn the TV off and then back on it comes on without problem. The problem only seems to occur when the TV is left off for extended periods of time.

  • Anonymous Jul 08, 2008

    Exact same issue...takes minimum 3 hits of power button to keep green light on and start playing. TV less than 18 months old. Seems to be a flaw in this model, maybe others too.

  • cindyechols Jul 13, 2008

    I have the same problem of the TV shutting off about 2 seconds after being turned on .

  • Todd Johnson Nov 02, 2008

    I have a 37MF231D same problem. needing to turn it on and off at least 4 times before it comes on

  • Anonymous Feb 03, 2009

    I have the same problem - if the tv is turned off for a long period of time it takes a couple presses of the button before the green light stays on and the tv turns on.

  • mvscag Feb 21, 2009

    Well folks, I hate to break it to you, but that's just the beginning...pretty soon it will take 45 minutes to an hour to turn on...then it won't turn on at all...not sure what to do, except use any and all Magnavox items as kindling!!!! Just another terribly unreliable product I feel suckered into buying!!!! Good Luck!

  • brianandjill Mar 21, 2009

    Typical junk from China and no customer support, or service solutions, except find and replace the bad capacitor on the power supply board. What cap and which board is it? Bought the tv August 06 and of course the extra warranty, so it takes a dump 6 months after it expires. $1700 bucks and now it's junk? Hate to say it guys but this is the way China makes money with dumb Americans like us. Buy it cheap every two years instead of once every 10 for a few bucks more. I see thousands of posts stating the same problem with power up on the 37 inch tv's yet Philips wont acknowledge the massive problem or help the service center guys by not sending the $4 part! BTW, the repair is $300 plus.

  • dcmm115 Mar 26, 2009

    Same thing, and as time goes on the warm up time gets longer-we are up to 35 minutes.

    Very frustrating!

  • woodallthoma Apr 17, 2009

    Guys, same problem here. Mine is about 18 mos old. Occasionally, I get nothing. Have to unplug and replug until the green light will do anything. Then, if I'm lucky, the screen flashes on and off. Eventually, after I am ready to throw the thing in the trash, it starts working and performs flawlessly until the next time I turn it off. For me, doesn't matter if it's off for a long period of time or not, it still struggles to turn on. I hate the thing and will never buy Magnavox again. My fault for trying to save a buck.

  • d_tisdal May 01, 2009

    I have the same problem! Lucky for me it just started to manifest itself last week. Turn it off and it takes forever to turn back on! Would it be worth the hassle and expense to pay $300 plus to get it fixed? It has a beautiful picture when it's working. How about the idea of leaving this thing on 2-4-7 until it finally quits? Thanks Magnavox...thats the last buck you'll get from me!

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Calm down Calm down. The problem is quite simple. You need to change one maybe two capacitors. Upon removing back cover. Look to the left, after removing foil tape, remove screws and flipover the board. The first cap to go down may have abulge on top or black tar oozing out the top. It is a 25volt 2200mf cap gone bad. Replace it. Second, sometimes and just sometimes next to thatone is 35volt 1200mf cap goes bad......remember just sometimes. You may have to replace it as well.

Posted on Jun 30, 2009

  • matt martin
    matt martin Jun 30, 2009

    Let me remind you. If you do decide to repair and replace your capacitor or capacitors use the 105 degree temperture cap. They are great under a load and most important be sure the polarity is correct before installing. Long lead is positive the short lead is negative. Get some popcorn and a bottle of pop and enjoy the movie.!!!!!!!!!!!!!

  • Rebekah Kaminski
    Rebekah Kaminski Nov 02, 2010

    I have no idea what you are talking about and I wish I did because this is driving me crazy on my TV. What does a capacitor look like? What tools would I need? Where do I get a capacitor?

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I just went and bought 2 1000mf 35v caps to replace the 2 that were bulging next to the 2200mf 25v that had popped it's top, oozing the black ****. I went everywhere looking for the replacement. I couldn't find one so I went up to a 3300mf 35v. (never go lower... EVER).
I just buttoned the set up, plugged in everything and Im back in business!!!!
WOOT!!!!!
SOLUTION #2 was the ticket and saved me God knows how much money. The cost to fix my set using solution #2 was $5.28 including tax.
Thank you!

Posted on Dec 17, 2009

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I've had this LCD panel for over two years and fortunately have not had any trouble, but I found a software / firmware update on Magnavox's web site and upgraded using that. This is something new to many people, since the old style CRT TVs did not require this. You can use a USB flash drive to perform the update.

Also make sure all lines (Cable, Power) are protected with a high-end surge protector.

Posted on Jun 13, 2009

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Replaced the 2074 with 35v 2200uf and the tv is back it is only 4.49 from radio shack while the tv repair shop wants $180.00 + $60.00 inspection fee.

Posted on May 20, 2010

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Solution #2 worked for me on my power supply, the only capacitor that I had to replace was the 25 v 2200mf one. It was obvious because the top of it was separated open with black showing.

The capacitors have a thick soild line on the - negative teminal side. Thanks maatmartin7 for the fix.

Posted on Dec 01, 2009

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Want to sell your broken-as-is 37mf231d to me? call or text 9797092849 ill pay for shipping as well

Posted on Dec 08, 2009

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Magnavox 37MF231D/331D LCD



1. Remove all screws around perimeter, one screw at the lower right at (Side A/V), and 2 1”round plastic knob s.
2. Remove back cover
3. At lower left side remove 2 screws for On/Off switch cut tie wrap that holds wire down for free movement.
4. Disconnect wire connector to side A/V at lower right side
5. Disconnect wire connector to right side circuit Board
6. Disconnect wire connector to left side circuit board
7. Remove the 2 mounting brackets upper left and upper right 2 screws each.
8. Remove 3 screws each side of the metal box in the middle
9. Fold back metal tape off bottom and top of metal box
10. 1 wire connector at top of box I left connected
11. Flip metal box over towards top of Tv. Be careful of wire at top thats still connected.
12. On left side in box is power supply board
13. Towards bottom of board you should see the numbers C2081 and C2074
14. Remove the six screws holding down power supply board
15. Flip board down towards bottom of Tv.
16. Unsolder capacitors replace with new 1200uf 35v and 2200uf 35v 105°C radial capacitors
17. Capacitors should be around 1/2” to 5/8” dia. X 1.25 long appox. 2 Wires come out of one end should be .030 dia.
18. Reassemble in reverse order and enjoy

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