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How do laptop displays get this messed up?

66659hi66659hi
edited November 2015 in Hardware
I got this Toshiba laptop from my neighbors the other day, and it has this really screwed up screen (which is shown in an image below). Apparently all of the lines just started coming up over time, and I have to replace the LCD. But what's bugging me, how does this even happen?

Quick ninja edit: If anyone sees this post before I've resized the image, bear with me, I'm going to change the image size and reupload it, sorry about that...it's a mistake on my part (Edit Number 3: Resized the image)

4QDUzeT.jpg

Comments

  • TCPMetaTCPMeta
    Cheap LCD module is the reason. The flatflex stripping to the LCD is usually the cause but 90% of the time it can not be fixed because it is hotbar soldered on.

    You can try a few things to rule it out such as pressing on the GPU while it's on so see if it disappears. Jiggle the flat flex cable or just replace the LCD.
  • 66659hi66659hi
    TCPMeta wrote:
    Cheap LCD module is the reason. The flatflex stripping to the LCD is usually the cause but 90% of the time it can not be fixed because it is hotbar soldered on.

    You can try a few things to rule it out such as pressing on the GPU while it's on so see if it disappears. Jiggle the flat flex cable or just replace the LCD.


    Where is the flatflex? I know where one of the cables is, although I'm thinking of the one that connects to the motherboard/screen/inverter (that one's removable on both ends), but I'm 99% sure that's not the cable you're talking about.

    I have already messed with the screen enough to know that I cannot fix it without replacing it though.

    Thanks for the explanation about how this happens though!
  • TCPMetaTCPMeta
    The flatflex im talking about is inside the LCD module. it connects from the LCD pain to the inverter / controller board of the LCD module.

    For a example this picture. The upper circuit board.
    LTD121EA4XY%20.jpg
  • 66659hi66659hi
    TCPMeta wrote:
    The flatflex im talking about is inside the LCD module. it connects from the LCD pain to the inverter / controller board of the LCD module.

    For a example this picture. The upper circuit board.
    LTD121EA4XY%20.jpg

    I'm guessing that we don't see these issues as often on business grade machines because they don't use the same cheap LCD Panels?

    Also, are the regular old horizontal and vertical lines (Not just those giant stripes on that Toshiba Satellite laptop) also caused by the flat flex stripping?
  • calvinbcalvinb
    Ohhh trust me. Base model business laptops love these kinds of cheap LCDs. The casing is just of higher quality.
  • TCPMetaTCPMeta
    From your picture it looks like just the vertical is screwed. I would replace the LCD or just scrap the system.

    LCD panels/modules are a bitch. Say HP just released a new laptop model. That model will have two to three different brand LCD modules through out the life span of that model HP put out until the faze out to the next newer system. They will buy them whole sale for about 20 bucks a panel and find even cheaper ones down the road to keep cost down.
  • 66659hi66659hi
    TCPMeta wrote:
    From your picture it looks like just the vertical is screwed. I would replace the LCD or just scrap the system.

    LCD panels/modules are a bitch. Say HP just released a new laptop model. That model will have two to three different brand LCD modules through out the life span of that model HP put out until the faze out to the next newer system. They will buy them whole sale for about 20 bucks a panel and find even cheaper ones down the road to keep cost down.

    Yeah, I have to think about what I'm going to do - it's an 8 year old Core Duo laptop, but it's in pretty good shape, wasn't used that much and a new screen isn't that expensive ($40 or so). It's a Toshiba Satellite P105-S6177 for reference. I'm probably going to replace the screen unless something happens that prevents me from doing that.

    Oh also, I've had a few HPs in the past, I know how stupid HP is with parts, although the worst things I've ever seen with HP are the DVXXXX laptops that had those faulty nVidia GPUs.
  • TCPMetaTCPMeta
    Not just HP but quite a few companies are to blame for. Including Apple.
    When you integrate a 3D graphics GPU it will get hot and overtime the soldering will loosen and the chip will raise causing bad contact. Even the PS3 and xbox360 suffered from this issue.

    After thinking about it the reason why the LCD on your laptop is dying is it uses a CCFL and those attend to get warm. Most LCDs will have two CCFLs, one on top and one on the bottom and the side that has the circuity to the LCD will soften up and loose contact. Yet sadly this can not be fixed. At lest with a system with a fault GPU placement you could reflow or even reball the chip.
  • 66659hi66659hi
    TCPMeta wrote:
    After thinking about it the reason why the LCD on your laptop is dying is it uses a CCFL and those attend to get warm. Most LCDs will have two CCFLs, one on top and one on the bottom and the side that has the circuity to the LCD will soften up and loose contact. Yet sadly this can not be fixed. At lest with a system with a fault GPU placement you could reflow or even reball the chip.

    Wait...are you saying that even if replace the LCD it won't be fixed? I know that it isn't a GPU problem, as it displays fine on an external screen.
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