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How do i fix my PN50B400P3DXZA tv. I found all the rjp30e2 on the LJ92-01688A board were bad.

I replaced all the rjp30e2 on the LJ92-01688A board and TV worked for about a minute then shut off again. Checked the rjp30e2 on the LJ92-01688A board and all were bad again.

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If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/

Posted on Dec 13, 2016

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That problem is usually cause of bad or dead set power supply board..

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Out of the blue....magnavox 42mf2387 42" tv, bought in 2008 clicks over and over again but never turns on...is this motherboard issue or something else? how do i fix it? can you fix it even?


I had a similar problem with my 42 in Philips LCD HDTV.


Here was the problem. My Power Supply Board had several bad capacitors. I opened my TV (warranty was expired of course) and found four bulged capacitors on the PSB. Many major electronics companies Philips/Magnavox, Sony, Panasonic, and others were sold capacitors that failed in 2-5 years instead of 10-20. The capacitors fail prematurely due to a lack of preservatives. Unfortunately, they were installed in all sorts of devices and cause a wide range of failure problems.


Here are some options for you.


1. Have it fixed by a professional $$$$$$$??????? (Is it under warranty?)

Remember, TVs CONTAIN HIGH VOLTAGE AND CAN KILL YOU! Do this at your own risk.

2. Open your TV and find PSB. (The board that the power cord plugs into) Check for faulty caps. If you find some (bulged or leaking) bad caps replace the entire board. The entire board costs around $250 right now because they are in high demand right now. They can be found online. I would definitely shop around though.


3. Remove and then replace individual faulty caps. This takes some soldering skill.

Caps are inexpensive and if you can take care of it yourself it will save you hundreds.


This may be your problem. If you determine that it might be.

I have a Tip/How TO tutorial on this site that may also help. It gives step by step instructions for replacing caps on PSB #715t2432-2. If this is your board you are in luck. Here is the Link: Fixing the Philips Turns/shuts off on its own problem. I

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1 Answer

My hp 42" PL4260N has sound but no picture. I


I had a similar problem with my 42 in Philips LCD HDTV.



Here was the problem. My Power Supply Board had several bad capacitors. I opened my TV (warranty was expired of course) and found four bulged capacitors. Many electronics companies were sold capacitors that failed in 2-5 years instead of 10-20. The capacitors fail prematurely due to a lack of preservatives. Unfortunately, they were installed in all sorts of devices and cause a wide range of failure problems.


Here are some options for you.

1. Have it fixed by a professional

2. Open your TV and find PSB. Check for faulty caps. If you find some (bulged or leaking) bad caps replace the entire board.

3. Remove and then replace individual faulty caps. This takes some soldering skill.

Caps are inexpensive and if you can take care of it yourself it will save you hundreds.


I have a tip/tutorial on this site that may also help. It gives step by step instructions for replacing caps on PSB #715t2432-2. If this is your board you are in luck. It's called: Fixing the Philips Turns/shuts off on its own problem.


Hope this helps and Good luck.


Kaufman605

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1 Answer

TV won't turn on w/either the remote or power button


Most likely your powerboard. Inside those are capacitors that are known to "pop". They have been widely used in many newer tv/monitor units since around '97 I believe. Anyway, Some problems with these things are a little harder to figure out, but a problem that shows a light(flashing/blinking/on for while/off for while) is to my new found knowledge a bad capacitor or 2 in your powerboard. I found a 19" lcd monitor2_bing.gif that didnt come on, but the power light is on. I bummed then googled it and found this to be a VERY common problem! I watched a video on youtube2_bing.gif how to fix your monitor and openend mine. I found 1 bad capacitator(bad caps show a buldging top and/or fluid leaking from them. one trip to Radioshack and $1.59 The problem was fixed! A rapair man woul;d order your board, install it and charge you around $300 or more. You could change your board yourself(saves money) or you could open your unit and inspect it yourself first, your fix could be $5 or less!....There are many pic etc to be found on google image for "popped" capacitors(caps), also there are video's on how to replace them on youtube...I hope this helps some

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Strange colors and shadowing and then went black.


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Lg plasma 42PC3D no picture with sound


I know you already replaced the board, this is for future searchers. If you heard a popping sound, then the picture went out, there is a 32 pin Sanyo module that goes bad on the board. That's probably what caused the fuse to blow. Replace the module, then replace the fuse. The module is less than half the cost of a used board. Since this was a popular model TV, there are lots of replacement boards on the used market.

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