Question about Sanyo DP42746 42 in. Plasma Television

1 Answer

Screen blacked out after 20 months of use

Same as most of the issues I'm seeing on this page. After 2 years half the screen blacks out for a while then completely goes black all together with sound still working. If anyone knows what the problem is I can change components out myself but don't want to pay half of what I paid for set to repair or throw away at the tune of $1500.

Posted by on

  • Anonymous Oct 03, 2008

    i was watching tv and suddenly the picture went black--sound okay please let me know when there is a new solution. i prefer not having to pay substantial amount for repair when the tv already cose me over $1000

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Sanyo Master
  • 5,568 Answers

If it is affecting video only, the display's power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself. 
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for two separate boards with mostly larger components on them; they will have ferrite core transformers on them and several larger capacitors which are cylindrical and mounted vertically to the board.

 
Before touching anything inside, especially on either board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.  
 
The section mostlikely to fail and cause your problem will be one that you see associated more with the display than the incoming AC line; the latter is the main power supply and its failure would result in no sound or video. 

If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.

If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.

Posted on Oct 01, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I fix my Samsung LN52A580 TV as the right half of the screen is totally black (even thought I get sound and picture on the left hand of the screen)?


Samsung HL-R6178W DLP TV half of screen goes black [Solved] - HDTV ...

www.tomsguide.com/forum/54431-4-samsung-r6178w-half-screen-black

Aug 28, 2013 - 36 posts - ‎24 authors
Samsung HL-R6178W DLP HDTV I just bought this tv used as is. Every once in a while, the right side of the screen goes black on all inputs. I have read ... As for the 1000 dollar price tag, that's totally bonkers. I found a web site ...Missing: ln52a580

HLR6768W - Right half of screen goes black - Forums - CNET

www.cnet.com > Forums > Samsung

CNETI have a 4 year old 67" Samsung DLP which has worked pretty well other than having... Over the past 6 months it's developed a new behavior where the right half of the screen goes completely black and stays that way until I power cycle the tv.Missing: ln52a580

Samsung LN52A580 Vertical Line Problems - YouTube

? 0:32
https://www.youtube.com/watch?v=eejE6O340EY
Aug 22, 2011 - Uploaded by Jonathan Polis
Samsung LN52A580 Vertical Line Problems ... This feature is not available right now. ... LED LCD TV FIX, How To For Samsung Double Image, Black Vertical Lines, ... Sanyo LCD with DistortedHalf Picture Lines Waves Distortion Distorted ... Samsung DLP Green screen / lines Repair HLR XX67 Series ...

lcd/led tv one side dark video screen display problem fix ...

? 2:28
https://www.youtube.com/watch?v=dYHPKxijz1A


Jan 21, 2016 | Samsung LN52A580 52 in. HD-Ready LCD TV

1 Answer

I have a 75" Samsung LED TV, and the top position of the screen is going dark, is that a power supply issue?


Samsung TV half the screen goes black or dark - YouTube

? 0:38
www.youtube.com/watch?v=Mmu5wq6LVgM
Jan 28, 2012 - Uploaded by DaReal2Face
Samsung TV half the screen goes black or dark. ... My samsung 40" - 14 months old does this on the top half of the screen. .. ****** 12 month ...

Sep 28, 2015 | Samsung Flat Panel Televisions

2 Answers

The TV has a Black cloud on the right half of the


My parents have the same issue with their Sony KDL-46V4100 TV and were told by the tech that the LCD screen was physically broken and would have to be replaced. The replacement of the screen would cost more than a brand new TV and the TV is not longer under warranty. After the TV is on for awhile the Black cloud goes away but it always comes back when they turn the TV off/on. It stays for 20 - 30 minutes sometimes. The Tech took both top corners of the TV and pushed one back and pulled one forward to show them he could recreate the problem after the black blob cleared up. By twisting the corners he made the blob reapper which he claimed was becuase of the damaged screen. I have no idea how the screen was damaged? I helped them take it out fo the box and set it up. We never dropped it bumped it once? It's never falled off the stand so go figure? It would be nice to find more people with this issue and get a recall going. Something that expensive should last longer than to two years.

Jul 03, 2010 | Sony Bravia KDL-46V4100 46 in. LCD HDTV

1 Answer

Half the tv screen goes black randomly,then returns to normal


The Tuner signal board have problems.The board CPU,Chip,have intermitten short.When the chip is completely dead.The tv will get only LED light indicator power only,will not get tv signal pictures.

Apr 12, 2010 | LG 42LC2D 42 in. LCD HDTV

1 Answer

Black shadow boxes on 46 in Samsung 46 in LCD HDTV.


Ur backlight video board is dying,must replaced to solved this problem.Part and labors about $500.

Dec 15, 2009 | Samsung LN-T4661F 46 in. LCD HDTV

5 Answers

Panasonic TH-42PX60U PLasma - 1/2 screen blacked out


If the screen split is exactly 50/50 top/bottom You are not getting SU or Scan Upper drive.
These are lovely set to work on.
Most likely is SU board itself - Not repairable just to be replaced.
Sorry I work in the UK so I can only guide that the UK part is around £30
SU may have been damaged by failure if the PDP (Plasma Display Panel) but is 9 years only had 2 screens damage the SU board.
There are several setups to do after fitting a PDP. If you don't have the service data - Do not risk it, Reduced life of the Panel and a safety risk.

Jul 21, 2008 | Panasonic TH-42PX60U Television

Not finding what you are looking for?
Sanyo DP42746 42 in. Plasma Television Logo

78 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sanyo Flat Panel Televisions Experts

The Knight
The Knight

Level 3 Expert

68153 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Cindy Wells

Level 3 Expert

4751 Answers

Are you a Sanyo Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...