20 Most Recent Philips Magnavox 42MF521D/37 Television Questions & Answers


I had lightning cause surge. Blew fuse and R101A

The color code is green yellow brown red brown. I believe that is 54.1k 1%
9/14/2018 4:27:14 PM • Philips Magnavox... • Answered on Sep 14, 2018

37 MF321D/37 flat screen will power on only after

9/28/2017 1:15:01 PM • Philips Magnavox... • Answered on Sep 28, 2017

My magnavox 42'' tv ,plasma wont turn on when i

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. Pull up older posts. 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.
9/6/2017 1:48:39 PM • Philips Magnavox... • Answered on Sep 06, 2017

Magnavox 37MF321D/37 flicking on & off

Sounds like you need to repair the power supply, don't fret, it can be really easy.  Here is a pair of youtube videos I made after following some advice on this website from other posters:





1/24/2016 9:05:45 PM • Philips Magnavox... • Answered on Jan 24, 2016


I just fixed this exact problem and I made a video on how I found the part and how to replace it. I also added a link below to order the part I replaced. L5973D STMicroelectronics Mouser
1/24/2016 9:00:14 PM • Philips Magnavox... • Answered on Jan 24, 2016

I have a magnavox 37MF321D/37 and the power wont

Just fixed that exact problem on mine. I made a video on how I found the bad part and how to replace it. I also added a link to the replacement part below. L5973D STMicroelectronics Mouser
1/24/2016 8:32:27 PM • Philips Magnavox... • Answered on Jan 24, 2016

What is the s pdf out port used for?

It is S/PDIF. It is a digital audio output for connection to a sound system.
5/22/2015 4:30:06 PM • Philips Magnavox... • Answered on May 22, 2015

Menu keeps popping up

dirt under the button
4/2/2015 11:58:03 PM • Philips Magnavox... • Answered on Apr 02, 2015

How do I connect a sound bar to my magnivox TV

There is only one set of out jacks, the rest are in and they are usually right next to the in jacks. You are looking for a set of red and white colored plugs, some have a yellow with that would make three next to each other. The sound bar will work whenever the power is on then all you do is turn down the sound on the tv.
12/3/2014 1:39:48 PM • Philips Magnavox... • Answered on Dec 03, 2014

Why does menu keep popping up and tv will come on by it self

Fault with main board. 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://electronicshelponline.blogspot.com/
8/23/2014 1:57:54 PM • Philips Magnavox... • Answered on Aug 23, 2014

No power

sounds like some of the Caps on the power supply board are getting hot.. check for swollen tops on top of the caps,, u can buy and replace the bad one. or a simple fix is just buy a new power supply board, Be careful fooling around in the power supply the Caps can and will hold a charge, and it will Let you know real quick if u touch one wrong. If you are not comfortable with soldering I would suggest replacing the whole board. it is usually real easy to replace. I would take lots of pictures Before u take the back off and even more of the power supply to make sure u get the new one in correctly. get the correct power supply parts # off the old one, do not remove the old one till u have the new one on hand.. I have replaced several power supplies in Flat Screen TV's this past year or two. it is cheaper that buying a new on.. good luck. and be careful and wear safety glasses make sure the power is OFF on the TV.
6/1/2014 5:02:09 AM • Philips Magnavox... • Answered on Jun 01, 2014

Tv cuts off

It's a fail safe. You set is shutting itself off due to wandering current from Blown capacitors on the PSB power Supply board. Replace the blown caps on the PSB or get a refurbed board from shopjimmy ebay or parstore. If you want to do the easy repair yourself get a soldering kit with flux from radio shack or harbor freight. Also get about a dozen thru-hole caps about 2v abouve the current load. They wull be UF caps and a bad cap will be bulged or puffed at the top. They should be completely flat. (X) Cap top view. Unscrew and pull off the back panel. Look for the PSB it will be printed Power Supply PSB on the board and the REV number (part number) will also be printed on the board for replacement. Make sure you unplug the tv completely when doing this. Disconnect the wire harness/ribbon cables and a few screws to pop the board out. Take pics or label the wires/cables so you know where to plug them back in when replacement or repair is done.
5/13/2014 9:19:25 PM • Philips Magnavox... • Answered on May 13, 2014

Magnavox 37MF321D/37

1. Try this - hold the menu button down for 10 seconds. TV should power up; you will have to turn off front panel buttons on menu.

2. You can also try plugging in the TV through the USB on its panel to a computer or USB charger, and it may work. However, this is only a temporary solution.

3. Powering down the set or putting it in standby may have allowed the power supply to cool. Weak capacitors often go out of spec when they cool, thus preventing a section of the power supply from firing up properly again. There is a simple trick...just warm the back of the TV with a hair dryer for 5-7 mins after you have unplugged the TV. Look for the little areas of holes in the back panel of TV. Use these as your guide at where to use the hairdryer, but don't hold the dryer too close (say 5-6inches away). (Make sure the dryer is on High heat). If the TV doesn't turn on after you have heated it up (like it tries to come on but then turns off) you need to unplug the TV again, this resets it. And repeat those steps till it works. Resetting the TV after it fails to turn on is the key. Also, just leave the TV on. Don't turn in off. Since it is LCD, it doesn't take much power...only a few bucks extra a month for your utility bill.

4. A circuit board may crack about some of the larger components mounted on it. You can inspect the PCB's for fractures, and then repair them. It may also be poor soldering that has failed. I would be checking for these things first.

5. If you want to go in for a long term solution, you can easily replace the whole power board or just change the faulty capacitors. You will have to open the back panel and take a look. You can make out which are faulty, because their caps will be swollen on top. Here's a sample pic (not same model):
Check the specifications of the faulty capacitors, and get the replacements from your local electronics shop. If you are comfortable with this, you can use a pair of needle nose pliers to G-E-N-T-L-Y pull out the defunct capacitors. Once that is done, solder in the new capacitors carefully. If are unsure how to do this, try to get a friend who knows how to do this kinda stuff do it for you, or get a qualified technician. Warning: If you do not have a background in electronics repair, or are inexperienced, get a qualified technician to do it for you.

REMEMBER there are very dangerous voltages inside a TV that can KILL. Be sure to work SAFE when dealing with electricity. DISCONNECT THE POWER BEFORE YOU DO ANYTHING.

Hope that helps!

If your issue is not resolved, please do not assign a rating just yet. Please post back as to what steps you took, results, etc, and I will try to assist you further as best I can. I am here at your service.

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4/8/2014 3:44:21 AM • Philips Magnavox... • Answered on Apr 08, 2014

42mf7000 17

A whole lot of problems stem from the Power Supply , that is the heart of the TV. since the cost of a power supply is not that much money. I would start with replacing the power supply. Look at your power supply and see if you can spot some Cap that have swollen tops. A power supply usually fixes the TV's I have worked on lately.. Hope this helps some...
3/19/2014 3:35:38 AM • Philips Magnavox... • Answered on Mar 19, 2014
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menu keep popping up tv will come self

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