Question about Toshiba 20HLV15 TV

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Toshiba 20hlv15 image turns bright colors and will sometimes disappear.

Hi i have a Toshiba 20hlv15 when i turn set on sometimes its fine but after being on for a while the screen colors start to act weird turning bright shades of green or other colors and sometimes the image disappears completely turning lcd off and on sometimes solves this problem and image will return to normal. can anybody tell me why image colors become distorted and how to fix problem?

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  • Andy12345678 Mar 28, 2008

    I have the same TV with the same problem. I bought mine at Costco in 2005 (before they changed their return policy on TVs). I don't have the original box or receipt, but I called Costco and they said that they will allow me to return the TV for a full refund.

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I took the unit completely apart and reassembled it, making sure to check all harnesses. I have been running the TV since I put it back together and it has been fine so far (3 hrs.). I was hoping that it was just a loose harnessToshiba 20hlv15 image turns bright colors and will - 4.gif when taking the unit apart. Although, I did not note a loose harness. The dvd player went wacky by just having the harness slightly off. I will run the unit some more and post my findings. I have to say I'm surprised that this is not a more common problem considering there are numerous people with this particular unit with the same issue. Also, just a note the unit was very clean inside, no dust issues, no blocked cooling ducts.

Posted on Mar 30, 2008

  • Michael Borquez Apr 02, 2008

    Still running great...

  • Michael Borquez Apr 04, 2008

    I have to say that this was an effective fix to just take the unit apart and remove all harnesses. One of two things happened.



    1. There was a harness that came slightly loose.

    2. There was a static charge in one of the boards that was released by unhooking all of the harnesses.



    This unit is quite complicated and should not be taken on by a novice. But, with that said I would like to let others know that this is not an expensive fix.

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Sounds like a bad connection in the set and the heat from being on causes the connection (wherever it may be) to open, causing that colors circuitry to stop working. This is most likely something that can only be fixed by someone who can actually get their hands on the thing. Sorry, but I don't think anyone online can help with this problem.


Hope this helps, and please rate my advice, good OR bad.

Good luck!

Posted on Feb 05, 2008

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1 Answer

The best contrast and brightness settings for a toshiba crt floor model tv,model 50A61


Televisions are unlike other consumer electronics products. Their setup and settings have a tremendous effect on how well they perform. The best TV on the market incorrectly setup will almost always look worse than a mediocre TV setup well.
Ideally, you'll get a setup disc to ensure the correct settings, but regardless, it's important to know what each setting actually does.
To get the ultimate performance out of your TV, a full calibration by an ISF Certified technician is your best option. Even if you go that route, it's good to know what the calibrator is adjusting. So here's a quick look at the basic settings every TV has, and what they do.
Please keep in mind, this is only a general guide in what each setting does, and rough idea how to set it. Correctly setting up a television is a completely different article.
Where to start
Nearly all modern TVs have picture modes. These are labeled things like Standard, Cinema, Vivid, and so on. Cinema or Movie is often the most accurate setting, with all the controls set to offer an image close to what a director intended them to look like. Most people aren't used to an accurate image like this, and to them the TV may appear reddish, soft, and possibly dim. Technically, it isn't. Other picture modes like Vivid or Dynamic are programmed to "pop" on a store sales floor with an overenhanced, blue image. Because most people don't change any of their TV's settings, this has resulted in most people thinking a TV should look blue.
The choice is yours, of course, but we here prefer an accurate image and suggest you at least try it for a few days. Once you get used to it, you'll never go back. Check out What's the best picture mode? for more info.
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Only LCDs have this control (though not all of them). This is a direct control of how bright the image is. Setting this lower will reduce eyestrain, and save a little on electricity. Before you adjust Contrast to make the image brighter, try here first. Check out LED LCD backlights explained for more on this.
Some plasmas have a control that drives the pixels harder, which in some ways acts similar to a backlight control. Samsung's name for this on their plasmas is Cell Light.
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Sometimes labeled "Picture." This control makes the image brighter...up to a point. Every television has a maximum light output. Once you reach this point, increasing the Contrast control further actually degrades the image. Correctly set, you would see a fluffy cloud in a bright sky. Set too high, you'd see a blotch of white instead. As mentioned above, try setting the overall light output of an LCD with the Backlight control first (if available). Then adjust the Contrast.
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This controls how dark the dark areas of the image are, again, to a point. Every TV has a minimum light output. Once you reach this point, decreasing the Brightness control starts removing "shadow detail." Correctly set, you'd see all the detail in a black leather jacket at night. Set too low, and it would be a black area on a black area, probably with a head sticking out of it. For more information on how the contrast, brightness and backlight settings interact, check out my article on contrast ratio.
Color
Can be thought of as color saturation. Setting this too high will make everything look cartoony. Setting it too low will make for an expensive black-and-white HDTV.
Tint
Rarely will you need to adjust tint, a vestigial control left over from the CRT "tube" TV days. It gives a green or magenta shade to the image.

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1 Answer

Toshiba 20hlv15 image turns bright colors and will sometimes disappear.


I will check what toshiba says about this problem, but in the meantime, make sure your tv is not overheating, make sure all airvents are open, you said you took it apart so I supose you cleaned all the dust and so on.

Il get back to you.

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Is the picture set very bright? Try reducing the brightness control to a level where the retrace lines disappear, and reducing the contrast control below the level where the blooming occurs.

If the television is more than ten years old or has many hours of use, the picture tube may simply be deteriorating normally. By nature, they have a limited life span. Before you decide to throw the set out, if you are technically-inclined, try adjusting the bias and screen drive controls for the television as recommended by the set manufacturer (you didn't specify what make or model the set is), and you may get a few months or years of additional life out of the set.

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best of luck

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Looking for a power supply


Sorry about the above post, but I wasn't signed in yet and this crazy GLITCH here put me down as a GUEST instead. The above post was mine, as I'm resending it again below.

Thx,

Frank

FRANK'S FIX IT SHOP


AC/DC power adapter + Power cord. 24VDC power adapter + power cord for Toshiba 20HLV15 20" Flat Panel LCD TV

Specification:
Input :100-240VAC (50-60Hz)
Output : 24VDC 4Amp (72W)

Part# ADP-2404-3PX

Approx cost: $50-60

Call Toshiba USA and give them that p/n for an exact cost quote plus shipping.

Best regards,

Frank


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