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I have a magnavox 47mf437b/37 tv. Had no picture at first. I replaced 4 capacitors on the power supply board and everything works great except I now have four very thin line horizontally across my scr

Magnavox model 47mf437b/37

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  • Televison & ... Master
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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/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Posted on Nov 15, 2014

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Posted on Jan 02, 2017

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rulds2008
  • 3866 Answers

SOURCE: Model 37M32ID/37 magnavox LCD.

I think that is the wrong fuse but still it would pop if you have a line problem on the circuit that fuse is piping for a reason not the value but there are more issues on the circuit then what you repaired I would start digging and see if there are more popped caps! not in the power supply but else where like the hd push board or the decoder in better terms.

Thanks hope this helps if you cannot get it done take it in for a estimate as estimate will tell you the issue fixed or not and you can take that advice from that tech and repair your TV!!

Please do click the accept button if you like my advise.

May i suggest a service manual?

Posted on Dec 19, 2009

Testimonial: "rulds2008 provided good and timely information and advice. I appreciate the quick turn around."

diodeic
  • 1622 Answers

SOURCE: I have a magnavox 47mf437b/37.

Hi,


Problem is in either power supply or the Y-Sustain board.

The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.


I hope this will help in solving the problem.....

Posted on Dec 06, 2010

snakehead
  • 1074 Answers

SOURCE: I have a Samsung 50

Your tv horizontal section is faulty change the horizontal transistor.or the diode that is at the leg of the collector of the HOT.do other checks around the transistor cause it can be more than one component is faulty in that section.also make checks in the power there is a diode that feeds from the pout put of tv regulator that might be leaking or is open.

Posted on Sep 28, 2011

  • 1 Answer

SOURCE: samsung TV LCD horizontal line up

chenge panel

Posted on Jan 25, 2013

gopakumarg43
  • 74496 Answers

SOURCE: Magnavox Model #42MF230A/37

It will be best to replace power board as card basis. Do not make any further adjustments. Normally, it is not possible to repair a power supply board to Philips. There are some typical components, used by Philips, that we can't get from open market. If you wish to get more details, surf this link. http://electronicshelponline.blogspot.com/ There are more than two thousand and four hundred posts. All are related to television and other domestic electronic equipment service help. More than Nine and half Lakh viewers cannot be wrong.

Posted on May 16, 2013

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Magnavox tv won't turn on or off


Hello,

The typical cause of power up problems in a failure of the power supply filter capacitors. The board can be repaired by replacing the bad components. Below is a picture of the power supply board with the bad capacitors circled and below that is a link to a it that is available with the correct parts to rebuild that board.


10_1_2012_3_58_30_pm.jpg

http://www.ccl-la.com/catalog/product_info.php?products_id=216


I hope this helps you out,
BuddyMc

Sep 25, 2012 | Toymax Magnavox 37MF331D 37 in. LCD TV

1 Answer

Magnavox 47MF437B/37 works fine until turned off. The red standby light comes on but the TV will not turn back on again. I have unpluggged the TV then plugged it back in again. Sometimes the the TV will...


Hello,

power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hope it work with the solution

Jun 12, 2011 | Toymax Magnavox 47MF437B 47 in. LCD TV

2 Answers

Tv runs for about 3 minutes shuts off I can restart right away but 3 mins later it shuts itselfe off again


I had a similar problem with my Phillips 42 in. LCD HD TV.

Here's the problem. The Power Supply Board. I opened my TV up(warranty was up of course) and found several bad capacitors. Phillips and several other companies were sold capacitors that although were highly rated failed within 5 years because of a lack of preservatives. All sorts of electronic equipment is now being effected due to these defective capacitors.
Solutions?
1. Take it in and have it fixed
2. Open it up, check the board for faulty capacitors(bulged or leaking) Buy a new Power supply board and install it.
3. Remove PSB, remove faulty capacitors and replace with compatible new ones.

Hope this helps

Sep 19, 2010 | Toymax Magnavox 47MF437B 47 in. LCD TV

1 Answer

37 INCH LCD MAGNAVOX TV WILL NOT TURN ON. MUST BE


This problems,very common in LCD tv,after the tv was in used about a year or two.The new technalogy LCD tv don't handle heat very well,not like the old CRT Tube Tvs.The power supply board tend to have bad capacitors componnents leakage,that bulges up it top or puff up gases escape,that why it take times or couples pushes to the power botton to turn the tv on.U know basic electronic's,and have soldering tools and solders?Take the tv aparts,check for these bad capacitors,that bulges,puff up in the power supply board and replaced them,than ur power will work normal again.Or tries Websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Apr 29, 2010 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Powers on but no picture or sound


i need a screen off a 47inch magnavox if u coudent fix urs and ur interested in selling me ur screen let me know
(47mf437b/37) noe28cervantes@yahoo.com

Jan 04, 2010 | Toymax Magnavox 47MF437B 47 in. LCD TV

3 Answers

Power Light


The most likely failure is the main power supply. You may be able to identify it with the following instructions:
Unplug your set overnight to allow potentially hazardous voltages to discharge, remove the back panel of the set so you can see the guts.
Look for a smaller board with larger parts on it; some cylindrical (capacitors), others block-like and relatively large (chokes and transformers).
You should also see a relationship between the board and the incoming AC.
Check the board for a label or if not present, a stamped-on number.
Call the manufacturer's service center with your TV model number and the number found on that board and inquire about repair/replacement costs; if both are offered, they won't be that much different.
If you must buy a new board, don't dispose of the failed one as there are smaller companies that can repair it for less than the mfr. and then keep it as a spare as this problem will likely arise again.

Unfortunately, the Magnavox name is owned by the Japanese Funai company which is known for poorly designed and not very reliable products.

Sep 07, 2009 | Toymax Magnavox 47MF437B 47 in. LCD TV

11 Answers

50mf231d/37 magnavox plasma


OK I have just taken care of both of these problems and now I want to share it with you DIYer's. As for the blinking red it is a software upgrade...go here...http://www.m4c.magnavox.com/cgi-bin/dcbint/cpindex.pl?scy=US&slg=AEN&cat=FLAT_TV_CA&sct=PLASMA_EXTRA_LARGE_GT43_SU&grp=TV_GR&session=20090902212032_75.92.128.105&ctn=50MF231D/37&mid=Link_Software&hlt=Link_Software....and download the software to your PC. Then unzip it to a USB flash drive. Power off your TV. Stick the flash drive into your TV's USB slot, found on the left side, facing the TV. Power it up and let it do it's trick. Pull out the flash drive when instructed. That's it.
Now for the power problem. I noticed that my TV was taking longer and longer to fire up. Once on it worked great. Well this morning it didn't come on. I heard the usual relay click then a few seconds later...two more clicks and nothing. The green LED stays lite but it's dead in the water. So I started surfing the web for common problems found with this particular model. I came upon this forum and saw something about a couple of capacitors. So I decided to look into it. I purchased the service manual online for around $8.00 at https://www.completeservicemanuals.com/philips/magnavox/plasma-television/50mf231d/37-service-manual/prod_677.html. Not that I thought I would need it but it doesn't hurt to have it. So I took my TV off the wall and placed it on my bed face down. Be very careful because this TV is heavy!!! You will need to remove the stand or wall mounts first. Then there are 44 screws holding on the back, 32 long and 13 short. Pull the back off from the top of the TV first, set it off to the side. Now your looking at the workings...in the center is the power supply board. Oh yea please make sure you unplugged from the wall. There are 8 wire connectors to the board, 5 of them come off by squeezing the clip on the back, the other 3 just pull out. OK, there are 8 screws holding down the board to the chassis. Before lifting the board, locate the capacitors first. If the top of the TV is away from you and the bottom is near your knees (assuming it's on your bed) look at the center bottom of the power board. Locate two capacitors that are identical and side by side. Their values are 3300uf 10V. I found that these two buggers were raised on top, kind of bubbled. (if needed I have pictures of the power board, email dstafursky@yahoo.com). I picked the replacements up at a local electronics store for less than $5. I simply replaced them and reassembled the TV. It works killer just like when it was new.
Good luck.

Mar 06, 2008 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

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