Question about Philips Magnavox 27MS343S 27" TV

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Power board in magnavox 37MF231D blows fuse right away. Caps are good on board and fuse still goes when disconnected from TV.

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  • sgardner357 Nov 17, 2009

    I can't seem to find any power boards, any help on where they might be available would be a big help.

  • Randy Bazemore Nov 18, 2011

    I just need the on & off switch is this wright

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  • Master
  • 1,284 Answers

Then you have a shorted regulator circuit. the best bet is to replace the power supply board itself. The part number is 313815864961. Please take a few moments to rate my answer, Thank you.

Posted on Nov 17, 2009

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1 Answer

The master lcd inverter bd. has a red led that goes out after few seconds


Hello, that set has a pair of inverter boards (back light boards) that usually are the cause, you may want to look for bad connections on the transformers and check the little white fuses to be sure their good. But these sets are getting old enough that I've seen the florescent tubes in the display go bad and cause the set to go into shutdown. If you want to try the bak light boards, I found these on E-bay for $20......thanks2f196b76-eae3-4989-b91a-2bf4ff61cb82.jpg

Aug 14, 2014 | Toymax Magnavox 37MF231D 37 in. LCD TV

2 Answers

Magnavox 37mf231d will not turn on, only have steady flashing led light-continuous


I just fixed mine that had a very similar symptom to this and it was a bad part on the main board. I made a video showing what part and how to replace it. I also added a link below to the part I ordered. L5973D STMicroelectronics Mouser

Aug 07, 2014 | Toymax Magnavox 37MF231D 37 in. LCD TV

1 Answer

Magnavox 37MF321D/37. suddenly just shut off and would not turn back on, no blinking green light nothing!


Price the board first and then decide, I fix these in our shop but do not like or enjoy working on them at all.

Dec 20, 2012 | Toymax Magnavox 37MF231D 37 in. LCD TV

1 Answer

Magnavox_37mf231d replaced caps still does not work


Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the power supply output is normal..The problem could be on the main board...
5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..
Hope this solution will be helpful..

Jun 13, 2012 | Toymax Magnavox 37MF231D 37 in. LCD TV

2 Answers

We have a Magnavox 37MF231D TV and it popped and now the screen won't turn on. No power at all.


Hi,
Popped sound was came from a blown electrolytic capacitor and most likely in the power supply board. This board has now gone to incomplete circuit(dead) that's why the led light is not lit. If your handy with electronics, you may troubleshoot this board and look for shorted capacitor, open fusible resistor, shorted voltage regulator IC, open fuse. If you can't troubleshoot it yourself, another option is to replace the entire power supply board for more convenient. No soldering required, just pull-out all the cables connected from the existing board and put in the new board.
Also, check if your unit is under warranty/extended warranty period, avail it because the manufacturer will fix it for free. Don't attempt to open the back cover because it will void the warranty.
Let me know if you need further assistance.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
Jdvillanueva

Jun 13, 2011 | Toymax Magnavox 37MF231D 37 in. LCD TV

1 Answer

Dead set


you can look at the capacitors on the power board if any of them have puffed up tops that is the ones. Also when you are looking at the power supply look under the heat sink at the top right they try to hide one.

Sep 06, 2009 | Philips Magnavox 50ML8105D 50" HDTV DLP TV

3 Answers

Need info on component 3071 on power supply board - burned up.


Its been a while since i worked on that power board. But I believe you are refering to the orange diode that runs into the single connector for the video board next to the power supply. I replaced mine with a 1n914 diode after replacing the 2200uf lytic cap and the tv fired right up.
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Jul 23, 2009 | Philips Televison & Video

2 Answers

Philips Magnavox 37" LCD Flat Screen 37MF331D Have replaced power board,main board,hit power a faint light on whole screen for about 2 seconds the nothing.


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.

Feb 19, 2009 | Toymax Magnavox 37MF331D 37 in. LCD TV

1 Answer

37mf231d power light flashes on and off will turn on after you keep trying


set the time on your tv and turn off the timer, sleep and wake funtions.

Jun 26, 2008 | Philips Magnavox 27MS343S 27" TV

4 Answers

Red blinking light on a Magnavox Plasma TV


Here is the solution. For less that 100$ your Magnavox Plasma TV. Model # 50MF2310/37 will be running like a champ.

Issue:

Magnavox Plasma TV. Model # 50MF2310/37 screen has no picture. There is no sound, TV comes on and then after a few seconds clicks and screen remains blank.

Cause:

On the main power circuit board to Capacitors are prone to failure from over load. The caps are 3300uf 10v 105+c capacitors located to the left of the AC power input.

Service:

Magnavox will refer you to a service center. They will advise $$$ for an inspection. They will also want to charge upwards of 500$ to replace the entire board.

Solution:

1. Unplug your TV
2. Disconnect all connections from your TV
3. With assistance lay your TV on its face on a non-scratching service
4. Remove the back panel screws.
5. Lift back panel off
6. The central board is your main power board.
7. Remove all wire harnesses from the main board.
8. Remove all screws that are holding the main board in place.
9. Lift the main board out and carefully place it into a non electromagnetic pouch.
10. Take the board to a Circuit Board repair shop.
11. Have them replace the the above mentioned Caps.
12. Re-install the board in your TV.

NOTE: Replace the caps with 3300uf 16v 105+ high temp caps(preferrably Japanese caps)

This fix cost me 80$ and my time to search for other who had the same issue. Try searching for Magnavox Plasma TV. Model # 50MF2310/37 bad circuit board or Magnavox Plasma TV bad capacitors or Magnavox Plasma TV bad ciruit board.

Hope this all help, Magnavox is should take ownership for this problem and recall any tv's that have these caps in them. The worst part about this is that teh **** from the repair center that was paid 100$ to check the TV, stripped out the screw holes and damaged the case for the TV.

Portland Laptop Repair was awesome. They repaired the board and it looked like new. Check them out at http://www.laptopportland.com/

Jeff G
Portland, OR

Feb 10, 2008 | Akai PDP4294 42 in. EDTV-Ready Plasma...

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