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I have sanyo tv model number DP46849 and the right side of the screen is darker than the left side and sometimes the very right edge turns some odd colors. Any help on what this may be? Thanks!

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Posted on Jan 02, 2017

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SOURCE: 42' plasma daewoo tv with vertical color lines.

the way how you described it looks like the screen is cracked but problem can also be in VPB (video process board).But without the model name its very hard to tell you more

Posted on Feb 19, 2008

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SOURCE: Toshiba 47" 1080P LCD 47HL167

Ok I have included some information that could be VERY helpful and given the correct credit to the original author. If you find this useful don't forget to rate the thread. Thank you.

Without proper documentation Don't mess around with the service mode adjustments unless you know what you're doing and have the service manual to guide you.
Once you enter service mode the first thing you should do is record all the original values BEFORE you change anything! - This is the only way to restore the television to its original (factory default) state should it become necessary to do so.

  • Sit in front the TV, you will need to be able to access keys on the remote and the TV at the same time. Turn the TV "ON"
  • Turn the volume all the way down to 0.
  • Press and hold the TV's front panel volume down button, and then press and hold the remote's "9" button for about a second.
  • The service mode will appear. \ -or-
  • Press "MUTE" on the remote.
  • Press "MUTE" on the remote again, but this time continue to press "MUTE".
  • While still pressing down on "MUTE", press the "MENU" button on the TV front. Release the "MUTE" button. You should now have an S (for service mode) displayed in the upper right corner.
  • Pressing MENU again should bring up the first service option Pressing the Channel Up/Down keys brings up the different service options. Pressing the Volume Up/Down keys changes the associated HEX value.
  • One you have entered the service mode, you can bring up the various test screens by pressing the "TV/VIDEO" button. For example, to minimize screen non-linearities, press the channel down key until PARA appears on the screen, with the associated default value (this is the parabolic adjustment option).
    Then, bring up the cross-hatch pattern by repeated pressing of the TV/VIDEO button. You can then use the volume Up/Down buttons to change the PARA settings, this should cause the grid to bow in (concave) and out (convex). Adjust until the grid is the most linear.
    The numbers 1,2,3,4,5,6 jump to different items. 9 displays SELF CHECK
    The number 7 displays a grid. There's a blinking cursor in the upper left corner. The numbers 2,4,6,8 move the cursor. 3 cycles the colors (RGB), 5 stops the cursor from blinking, then when you push 2,4,6,8, you are adjusting the convergence at that point for the selected color. Pushing 7 again gives you a "warped" grid for a few moments. Pushing 7 again removes the grid from the screen.
    If you're attempting to adjust color or geometry errors, you'll need the Video Essentials DVD, Laser Disc or some other source of test material.

  • Original Text from: Setting Your Monitor to NTSC Specifications by Anthony W Haukap

    Posted on May 08, 2008

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    SOURCE: Green band
    click warranties...
    Important Warranty Announcement for LCD TV Owners

    Posted on Sep 20, 2009

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    SOURCE: Vertical colored lines on left half of screen.

    I had this problem on a 37" Viewsonic LCD. Pulled it apart and through a process of elimination, I traced the problem back to a small board with several flat white ribbon cables coming out of it. The board was near the top center of the screen and under a ton of other equipment requiring almost a total disassembly.

    This small board was clean but I noticed one of the rubber standoffs had slipped down and was making contact with one of the outputs running to the LCD. It also happened to be the output running to the section of the screen with the problem.

    I postulated that the sticky glue on the rubber standoff may have just enough conductivity to cause a problem. Moved it so that it was no longer touching anything electrical and then reassembled the TV.

    Afterwards, I turned it on and was pleased to see the problem has gone away! If you're having the vertical line problem, then maybe this could be your problem too, especially if you have a Viewsonic since it could be a manufacturing defect.

    Posted on Mar 22, 2010

    • 131 Answers

    SOURCE: Our sanyo lcd tv is a couple of years old and

    Hello; I am John at J. D. Electronics, Poland Maine. This problem is caused by a defective LCD panel. This part is very expensive! Aprox $ 1000.00 from Sanyo and less than $400.00 from Encompass Parts Inc.

    Posted on Oct 09, 2010

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    1 Answer

    Vertical half screen gets darker

    There's a board in the middle of the set ( back taken off) near the bottom of the screen. It has 2 flat ribbon cables that go to the screen. It is under a metal heat sink. That's the board that's causing the problem. has the board for a very reasonable price. Takes about 15 minutes to change.

    Jan 24, 2014 | Sanyo DP46849 46 in. HDTV

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    Dp46849 four white verticle lines on left side

    Sounds that the power supply board has the fault. If you wish to know more, check this link. Pull up older posts there. Screen shots of defective screens are shown. Compare it to that of yours.

    Mar 21, 2013 | Sanyo DP46849 46 in. HDTV

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    That sounds like a faulty LCD panel tab. The only true fix is to replace the screen. This usually isn't cost effective.

    Jan 19, 2013 | Sanyo DP46849 46 in. HDTV

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    Sanyo TV DP42647 Screen Has Dark Stain

    If you wish to get some details; visit the site linked here. Pull up older posts.
    faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
    Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

    Jun 27, 2017 | Sanyo Televison & Video

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    Sanyo dp46849 right side is darker

    es it sounds like a Tcon but be careful ordering one because Sanyo had about 9 different versions of that model number all using different boards. You can get the correct one and free repair assistance from

    Oct 27, 2012 | Sanyo DP46849 46 in. HDTV

    1 Answer

    How do I fix a A black screen on the left side of

    Hello; I do a lot of Sanyo repairs and have seen this problem several times. The left side may be black always or sometimes. In either case the LCD panel is bad. the part from Sanyo was last $1000.00. There seems to be some refirbs or knockoffs for $400. Time for a new set. John

    Jul 08, 2011 | Sanyo DP46849 46 in. HDTV

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    My sanyo dp46849 screen is discolored with red and black, any wisdom is appreciated

    common issue with this model. if im correct not only is it red but it also has a ghosting affect this is caused by bad controller boards connected to the tv screen itself it is not any easy fix the only real option is to replace the whole panel which can cost between 200 to 1500.

    Feb 22, 2011 | Sanyo DP46849 46 in. HDTV

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    Our sanyo lcd tv is a couple of years old and recently when the tv is on for the first couple of hours the screen will flicker and get progressivly darker from the center of the screen to the left....

    Hello; I am John at J. D. Electronics, Poland Maine. This problem is caused by a defective LCD panel. This part is very expensive! Aprox $ 1000.00 from Sanyo and less than $400.00 from Encompass Parts Inc.

    Oct 09, 2010 | Sanyo DP46849 46 in. HDTV

    1 Answer

    We have a Sanyo 46" 1080P lcd tv that has been going black on the left side for about 2 months now ,it's like a black square on the left side , can you tell me what this is and what the cost would be to...

    We've had the Sanyo 1080p Flat screen TV for about a year and a half and the right side of the TV is black when we turn it on and after about 45 minutes in brightens. Sometimes it still has lines flickering throught he uper right.


    Oct 05, 2010 | Sanyo Televison & Video

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