Question about Westinghouse TX-47F430S 47 in. LCD TV

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Backlight inverters, or power supply issue?

The TV turns on, and works fine for a short while. Towards the left side of the screen there is a small shadow that runs all the way down the screen. After a while, the screen will go blank, but is still lit and has audio. You can restart the TV and the picture will come back until it happens again. With the TV off there is a buzzing noise coming from the back of the top of it, which leads me to think it might be a power supply issue? I did my research and it all leads to the inverter boards, but I need some help here.

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  • Westinghouse Master
  • 74,383 Answers

T'Con board fault. Check and replace it. If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

Posted on May 14, 2017

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Posted on Jan 02, 2017

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welcomejee
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SOURCE: LTV-32w1... at wits end.

Its problem with Inverter board. Please check its connectors, unplug and reinstall them.

Posted on Aug 25, 2008

  • 1 Answer

SOURCE: westinghouse 32 inch screen goes blank

I had the exact same problem and I fixed my Westinghouse 32 inch by replacing the power supply. You can purchase it at
http://www.partstore.com/Part/Westinghouse+Digital+Electroni/Westinghouse+Digital/4900211680/New.aspx?ModelMfgName=Westinghouse+Digital+Electroni&ModelBrandName=Westinghouse+Digital&ModelNumber=LTV32W1

I takes about 15 minutest to replace. Just take the back lower panel off and replace the power supply. Mine works like new now.

Posted on Jan 25, 2009

  • 66 Answers

SOURCE: Westinghouse LCD tv LTV-32W4 has great sound but no picture.

Your television actually has a backlight bulb which can be replaced at our parts request email and phone number. Email address: Parts@wde.com. (866) 839-5888

Posted on Jul 29, 2009

  • 8457 Answers

SOURCE: Westinghouse HDTV TX42F430S, No picture or sound.

Tries websites Shopjimmy.com,Ebay.com to buy a refurbish Main Tuner signal board for the replacement.

Posted on Mar 17, 2010

Testimonial: "Thanks for the lead on the parts."

  • 92 Answers

SOURCE: Within 10-30min the screen colors screw up

This is an easy fix. You must remove the shielding tape on the connector where the main video cable connects to the t-con board. The t-con board is underneath the mainboard chassis. I had to do the same repair on my LTV-32W3 32".

Posted on Mar 26, 2010

Testimonial: "I didn't know what some of the things (t-con board) were, but directing me to their locations helped a lot. Brief and effective info overall. Thanks!"

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LCD screen flickering


Display Configuration A flickering screen may be caused by the computer detecting incorrect display settings as it starts or returns from sleep. It can also come from changes to the screen resolution settings caused by a new program or update installation. Verify screen resolution before assuming the issue is hardware related. Faulty Inverter Next to the display screen behind the plastic screen bezel is a small component called the inverter, which supplies power to the screen backlight. The flickering indicates the power is not reaching the backlight. To fix the issue, replace the inverter. Faulty Connectors The wires and cables traveling from the display around the hinges and into the motherboard tend to wear at the hinge area. Over time, the opening and closing of the screen causes this wear. The solution is to disassemble the plastic casing of the laptop, reorganize the cables so they have no interference from hinges, or replace the cables and connectors with new ones made specifically for the computer make and model experiencing the issue. b> Test an LCD Inverter An inverter is an electrical device on the bottom of your laptop screen. The job of the inverter is to convert DC electrical current to AC voltage to maintain power to the backlight lamp. If the display on your laptop is dark but working, odds are the inverter or the lamp are at fault. When troubleshooting monitor problems on a laptop, you may need to evaluate the inverter to determine which of the two parts is malfunctioning.

Remove the screen bezel on your laptop. The bezel is the piece of the computer casing that surrounds and protects the LCD screen. To remove the bezel, remove the screws around the screen. Bezel removal method may vary by model. Once the screws come out, the bezel should pop off. The inverter will be under the screen. Attach the positive probe (+) of a multimeter to the pin 1 on the inverter. The inverter has two connections, one on each end. With the laptop screen facing you, look at the left side of the inverter. Pin 1 is the top metal flange pointing to the right. Secure the negative probe (-) of the multimeter to any bare screw. There should be a screw securing the inverter to the laptop that will be perfect for the negative ground connection. Turn the laptop on to test the inverter. Turn the multimeter on and check the multimeter reading. If the display records voltage going to the inverter, such as 19 V DC, the inverter power supply is working. Turn the laptop off. Unplug the LCD inverter connection on the right side of the inverter. This disconnects the backlight from the inverter. Plug a working backlight to the connection on the right side of the inverter. Turn on the laptop. If the screen lights up, the backlight lamp is bad but the inverter works. If the screen remains dark, the inverter is bad.

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1 Answer

Hp 6735sscreen does not come on


Step 1:
An inverter is an electrical device on the bottom of your laptop screen. The job of the inverter is to convert DC electrical current to AC voltage to maintain power to the backlight lamp. If the display on your laptop is dark but working, odds are the inverter or the lamp are at fault. When troubleshooting monitor problems on a laptop, you may need to evaluate the inverter to determine which of the two parts is malfunctioning.

Remove the screen bezel on your laptop. The bezel is the piece of the computer casing that surrounds and protects the LCD screen. To remove the bezel, remove the screws around the screen. Bezel removal method may vary by model. Once the screws come out, the bezel should pop off. The inverter will be under the screen. Attach the positive probe (+) of a multimeter to the pin 1 on the inverter. The inverter has two connections, one on each end. With the laptop screen facing you, look at the left side of the inverter. Pin 1 is the top metal flange pointing to the right. Secure the negative probe (-) of the multimeter to any bare screw. There should be a screw securing the inverter to the laptop that will be perfect for the negative ground connection. Turn the laptop on to test the inverter. Turn the multimeter on and check the multimeter reading. If the display records voltage going to the inverter, such as 19 V DC, the inverter power supply is working. Turn the laptop off. Unplug the LCD inverter connection on the right side of the inverter. This disconnects the backlight from the inverter. Plug a working backlight to the connection on the right side of the inverter. Turn on the laptop. If the screen lights up, the backlight lamp is bad but the inverter works. If the screen remains dark, the inverter is bad

Feb 24, 2013 | HP Compaq 6735s Notebook

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Sony Bravia KDL-46NX810 shuts off with 3D input only


Well written question but I would first call Sony Customer service to see if known issue or if the data base shows any reports or recalls for this issue.......

Oct 29, 2012 | Sony KDL-46NX810 46 in. 3D LCD TV

1 Answer

I have a 26' Toshiba LCD TV Model: 26WL65G. When I plug in and turn it on it seems to start normally, but when screen turns on blue screen appears as normal and it goes back to stand-by mode...


Note that if it is a backlight inverter board problem you will still have sound. SInce you have no sound I would suspect a power supply or main A/B board malfunction. Do you know how to use a multimeter?

Dec 11, 2011 | Televison & Video

2 Answers

My samsung LE40R74BD set works fine for about 10 mins then screen goes blank (black) . It would appear there is no back lighting. I have visually checked the psu for blown capacitors but all seem to be...


This does not seem to be a power supply issue but rather an issue with the backlight inverter board. When the screen goes black, take a flash light and focus it on the screen from a close distance and several angles. See if you notice a very faint image. Try changing the channels to make it more noticeable. Try it and let me know

May 09, 2011 | Samsung LE40R73BD 40 in. HD-Ready LCD...

1 Answer

I have a vizio 46 in lcd model # VW46L FHDTV10A and it started with the whole left side going dark and then it would get better after an hour or two. then about a week later the entire left side of the...


I would suspect the backlight inverter is faulty:

I would try to look on the power supply first for popped capacitors that supply the 24v rail for the backlight inverter.

Having sound is a positive when it comes to repair. This means that only your screen is not lighting.

If you repair the 24v line and check the 5v feed also going to the BN_on (on) the backlight inverter and you still have no picture...you will need a new inverter.

This could also be the CCFL bulbs that are aging and need replacement. Those are around $20 each for a bulb

Hope this helps! Please rate :)

Mar 14, 2011 | Vizio VW46LFHDTV10A 46 in. LCD TV

1 Answer

I have a samsung ln-t4053h that had a bad caps. I replaced the caps and the tv turned on fine and i put a flashlight to the screen and the screen turns on but the backlight is on 10 and it looks like its...


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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When i turn on the tv the power light is on but the backlight doesnt turn on. Does that mean i need a lamp?


Jul 20, 2010 | Element Electronics FLX3210 32 in. LCD TV

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Have beko 32inch L C D , when i power on it comes on for a 5second and then the screen goes black, i still have sound, just no picture? model no 32WLK53OHID ITS NOT LED TIS IS LCD


Hi


Thanks for using FixYa. To check what has gone bad you’ll have to open the back of the unit and check the backlight inverter board. The inverter is the power supply source for the backlights. If that’s the issue then it’s always better to replace the inverter board completely just to avoid any future issues. If not then check the power supply board however, it seems to be the inverter board as the sound is still working fine.Please do accept the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

Jun 01, 2010 | Televison & Video

2 Answers

I turn on my computer but the screen is still black


think you might have a failed screen inverter (FL inverter); this problem is very common with laptops. The inverter board acts as a power supply for the LCD screen backlight bulb, it converts low voltage DC power into high voltage AC. On most laptops the inverter board is located inside the display assembly below the LCD screen and you can get access to it if you remove the screen bezel (LCD mask). When the screen inverter goes bad the backlight will not turn on anymore or it turns on for a short time and then goes off, but you still can see a faint image on the screen and the external monitor works just fine. First of all I would make sure it’s not just a loose connection and reseat connectors on the inverter (it looks like you already done this part). Next, I would try replacing the inverter board. It might fix your problem with the backlight. It’s possible that you have a faulty cable, bad motherboard or even bad LCD screen, but I would try replacing the screen inverter first.

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My Westy 47 TV has a very strange power-up problem! First, I found that the power supply was bad, I couldn't repair it, so I bought a replacement from ShopJimmy. The replacement seems to be working fine, and sometimes the TV works fine. The little green LED near the bottom edge of the controller board lights up when you connect the AC power, as it should. There is also a small green LED near the upper edge of the controller board that apparently lights only up when the controller is working properly. I've replaced the 470 mFd, 16 V. 'Lytic on the controller board, as everyone says to do. I still observed about 0.8 Vp-p of digital signals on the 5 Volt buss with the replacement capacitor these signals looked kind of like a 300 kHz clock and some other misc. digital stuff, so I added a couple of 0.1 mFd disc ceramics directly across it on the bottom side of the board. That reduced these signals to about 0.4 Vp-p, but the TV still won't turn on. The orange pilot light on the front is lit, but neither the buttons nor the remote will turn it on. The only way I can get the TV to turn on is to do the following: 1. disconnect the two power cables going to the two lamp inverter boards; 2. plug the AC power cable in. The 2nd green LED on the upper portion of the controller board now lights up when AC power is applied. 3. plug in both power cables to the two inverter boards while the power is on. The TV now works fine - all of the lamps light up, good picture, blue LED on the front panel, the remote works, etc. However, if I turn the TV off, and try to turn it back on, the small green LED on the upper controller board goes off, and the set won't come on! I've tried holding the on/off button down for over 10 seconds I read that this might re-boot the controller to no avail. The only way to get it back on is to go thru the 3 above steps again. I've read that there appear to be several versions of the firmware, and I wonder if this might be a firmware problem. If so, how/where can I get the proper firmware to install? Any suggestions? HELP! Please If someone would like to call me, please do at ************. Thanks, Gary W3DTN

Dec 28, 2015 | Westinghouse TX-47F430S 47 in. LCD TV

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