Question about RCA 46 46LA45RQ LCD TV

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46 rca model 46la45rq comes on for just a second then the screen goes black and it only plays sound! what needs to be replaced

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  • RCA Master
  • 933 Answers

Sounds like you have a backlight problem. To verify this, turn on the set and dim the lights in the room. Take a bright flashlight and shine it on the screen. Do you see a faint picture?

Posted on Jan 14, 2013

  • 4 more comments 
  • Scott Morgan Jan 14, 2013

    Yes! When i shine a flash light a very faint picture appears. What does this mean?

  • Back2life Electronics Jan 14, 2013

    You have a backlight problem. It could be that you have a problem with your 24vdc power supply output, bad bulb, defective inverter board(s), or in a rare case, a main board problem. Based off of my experience, it sounds like a bad bulb. Unless you have electronics repair experience, I would recommend you get a diagnoses done.

  • Scott Morgan Jan 14, 2013

    I have removed the back light inverter because i thought that might be the problem, but i dont want to pay for a new one if for sure thats not gonna fix it. The tv was struck by lighting and i payed 250 bucks to get main board replaced. Do you suggest i pay 42 dollars and replace the inverter of just buy a new Tv?

  • Back2life Electronics Jan 14, 2013

    Oh no, lightning damage can do a # on flat panel TV's. I would recommend replacing the set. You've already sunk money into a main board and that didn't fix the problem, I'd cut my losses and buy a new set. Sometimes lightning can damage multiple boards. Toss the TV on your local Craigslist and list it as a parts set. If you get $40-$50 for it as is, take the money and run.

  • Scott Morgan Jan 14, 2013

    Yeah thats kinda what i was thinking. Just so we are clear though, when i got the main board replaced, it worked fine for 5 months. now all of a sudden this problem with the backlight. now sure if that changes your opinion or not. Thanks for your help.

  • Back2life Electronics Jan 15, 2013

    It is very possible that the surge damaged the main board and weakened other circuitry thus causing the failure after 5 months. Toss is on Craigslist and just mention that it has a backlight problem. Also be sure to include nice pictures of the set, will help bring a quick sell

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SOURCE: Need to order a replacement 46" LCD Screen

Sorry,not repairable,because the LCD screen panels are limited produce by the Tvs Corporations.No where u will able to buy a LCD Screen panel for the replament,but except by the tvs corporations themselves.Because it limited production of the LCD screen panels,they will sell it to u the same as a new tv.Might even cost more after the labors of by replacing the LCD screen panel.

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SOURCE: rca l32wd22 blackscreen

princess_dc6,
Just recently, I was told how to get another tv.
You find a good TV service centre and ask them to fix it. If they cant you take the work order from your tv sc and call 1-877-297-8391.
You will get yourself a tv

Posted on Jul 21, 2010

dcramer531
  • 1654 Answers

SOURCE: The 46" RCA Flat screen

Hi are you getting any flashing codes from the power light or is it steady. These codes tell us what is going on. The main reason on these sets that cause a condition like this is the power supplies going bad. these are just circuit boards that regulate the power for the set and they tend to overheat and eventually go bad. Have you had the cover off and looked at the boards for any damage, bad capacitors or burn marks?

Posted on Aug 13, 2011

SD Tech
  • 14553 Answers

SOURCE: Have a RCA flatscreen model # L40FHD41, blue power light comes on and stays solid but I don't get any picture or sound. Screen stays completely black as if it doesn't have any power at all.

Other than checking all the connections going to it for signal it is likely a shop repair.

The nature of these sets is someone must open and inspect them and check for voltages missing.

At that point it becomes a guessing game---try the boards (purchase them) and see if a bad board.

It is always possible the front screen unit or display has failed which is fatal cost wise.

You have to weigh the cost of repair, age of set and cost of replacement in this.

The only way anyone can KNOW which board is bad is to actually remove and replace it----most shops look at it and shoot you a high estimate.

let me know if you have questions.

Posted on Mar 14, 2012

  • 26 Answers

SOURCE: Have RCA 1080p model number 46LA45RQ has a blue

if it is a single blue dot one pixel wide and one pixel tall thats probably normal. If it is bigger than that I would RMA the thing while you still can. LCDs are often sold with bad pixels. Not ussually more than a few. Its in the manufacturing process and is within tolerance limits. I forget how many the going standard is. Good luck with it sounds like a nice TV.

Posted on Apr 04, 2012

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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/.
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Was this the original problem before replacing the main board?
Maybe you have to set the new main board from maintenance menu. Sound and image comes from the main board, so i believe it has to be something about it...

good luck

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Rca tv powers up has backlight no sound or picture replaced main board and inverter


I would check the input board for correct power supply input
check the blue 15pf 6kv caps near the output from the PSU to the inverter.

Aug 31, 2014 | RCA 46 46LA45RQ LCD TV

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RCA 46LA45RQ tv turns on with sound and after 1 second the picture goes out. The blue power light stays on and the audio, but no picture.


Back-light inverter board fault. Replace it. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magzine" will make surf easy Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

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Here is the direct troubleshooting from the manual.
Is a link to the manual, if you go to page 35 of the manual there is troubleshooting for your exact issue. I atttempted to copy and paste directly but it would not allow me to post here. Please note that you will need adobe reader to view the document.

RCA Television

Adobe Adobe Reader free PDF viewer download

Apr 09, 2014 | RCA 46 46LA45RQ LCD TV

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TV has sound but no picture.


Most likely the inverter board if the screen is completely dark (black) But if its a very darkt Blue then its the Tcon most likely. You can get either board from www.tvrepairworld.com

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Weird colored bar


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