Question about Televison & Video
Would love to be of assistance, but ...
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Posted on Nov 08, 2014
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Posted on Jan 02, 2017
SOURCE: magnavox 50mf231d/37
The clicking is the Stby relay. Your fault is on the PSB. Change the 1000 UF 10V Capacitors PSB with no more than 8V above the current rating. There are two of them side by side. Yuu can get new caps at radio shack or frys rtc. Get polar electrolytic caps with 105 C heat rated.
need some help email me
Posted on May 08, 2009
SOURCE: 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
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 email@example.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.
Posted on Sep 03, 2009
you have some bad caps on the power supply board these can like devices will have a puffed up top where it vented the value is written on the side of the part
Posted on Nov 24, 2009
SOURCE: I have a Magnavox 50mf231d/37
There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom (look for discoloration of the circuit board around the base of the capacitor) need to be replaced.
If you repeatedly turn it off and on, eventually it'll probably stay on, but every time you turn it off, the unit will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for some time and then try again.
If you aren't tech savvy, don't worry, read the rest of this solution and watch the videos.
If you are handy with a soldering iron and can identify the power supply and/or inverter / FM section for the backlights, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are SURE it's only doing supply output ripple filtering,
and even then, you should go OVER, not under the uF rating).
Most of the caps that go are 10V 1000uF or 3300uF.
I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.
Backlight related video here:
As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors, amplifiers, computer power supplies and motherboards, and other electronic equipment.
The parts are cheap, and skill required is minimal.
A great parts source is Digi-Key, and you can order the parts online at www.digikey.com
They typically cost under a dollar a piece plus a flat shipping rate.
The parts usually arrive one business day later.
If you watch the third video, you will see that even someone with no soldering experience can perform these repairs as demonstrated by the woman in the video.
Posted on Aug 24, 2011
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