Question about Philips Magnavox 42MF521D/37 Television

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Magnavox tv My tv cuts on and about 10seconds to 10 min later the tv cuts off. It cuts right back on then it cuts back off sometimes 10 sec sometimes 10 min later. It is a 36" tv.

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  • Anonymous Mar 27, 2014

    Tc-p50x5 cut tv off came home later and the TV wouldn't say or do anything at all

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The automatic code is actived.

Posted on Nov 20, 2008

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Plug it in &i have green light the picture comes on 5 to 8 sec later picture cuts off green light still on tv still on about 15 to20 sec later tv cuts off


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Jan 20, 2016 | Flat Panel Televisions

1 Answer

Why does it turn from blue to black after 10 sec.?


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced.

Dec 15, 2015 | RCA Flat Panel Televisions

1 Answer

Magnavox 32" keeps shutting off as soon as I turn it on?never did before Only does it sometimes unless I try xboxone To turn it back on I have to unplug TV wait a couple mins then plug it back in.


Check and replace the damaged component/s at its main board. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Jun 27, 2015 | Magnavox Flat Panel Televisions

1 Answer

Every 5 mins The sound keeps going in and out (for about 5-10 sec, sometimes we have to turn the TV completely off, cuz the sound doesn't return. Is this a TV issue or could it b a cable issue (this...


You could try another cable on the input to this TV, if it still does it, then it's an issue with that TV. You didn't say how old this TV was, you may have to take it in to a TV repair shop, talk with them first.

Mar 17, 2015 | Flat Panel Televisions

1 Answer

Volume goes up, picture freezes, tv reboots


Sounds like a surge to me. Why not give Vizo call to see if anyone else is reporting the same problems. It's a fantastic tv.

Apr 22, 2014 | Vizio E421VA 42 in. LCD TV

2 Answers

I have a Magnavox 37MF32id137 we turned the tv off on the front went back about 25 min. later and it would not turn back on there is a dim green light flashing but has not turned back on in the last 24...


You have a bad Capacitor. Look for a bulge on this cap. Location is 2074 and it is a 25volt 2200MF cap gone bad! And there may be another very close by that may also need replaced...you will see it ,and is bulged or skinned

Feb 09, 2010 | Toymax Magnavox 37MF231D 37 in. LCD TV

3 Answers

New JVC flat screen cuts off 10 sec. after cutting on


1. Hold [menu] and [vol-] button on the side of the TV
2. while holding these, press the [power] button on the side of TV (NOT remote)
3. blue light comes ON and stays ON
4. wait 10 seconds then let go of [menu] and [vol-]
5. wait another 30 seconds and some type of picture should appear

Mar 26, 2009 | JVC LT42P789 42 in. LCD TV

1 Answer

Tv cuts off and green light flashes


If your set was manufactured around July 2005, you may need a firmware upgrade to solve this issue. On the Sony website you can enter your model # and serial # to see if you TV is affected. If so, it is easy to have done and may be free from Sony. It sounds like the issue they described in the writeup on the required formware update. I had mine done within few months of when i bought it (purchased in Dec 2005) and it has been working flawlessly since.

Good luck!

Donnieboy999

Jul 19, 2008 | Sony KDF-E42A10 42 in. LCD Television

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