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Toshiba Satellite L505D video issue

Discussion in 'Laptops' started by ken10254, Nov 29, 2010.

  1. ken10254

    ken10254 Guest

    I've lurked on this group for years, but now I have need of the
    experts here. The problem is with a Satellite L505D-S5965, with an AMD
    Athlon dual core cpu, ATI video chip, 3 gig of RAM and a 15.6" LCD at
    1366 x 768 resolution. The issue is with the screen. On the LCD, after
    about 15 minutes there is a noticeable flicker and the screen moves up
    about 1/4" then seems to resync then does it again. Doesn't matter
    what OS is used, but the kicker is that it works fine on an external
    monitor. It seems to be a very high speed flicker, almost a blur, then
    a clear screen until it repeats itself. This becomes extremely
    annoying, obviously, so I am looking for ideas to try to fix this.
    Anyone? Thanks.
    BTW, I am able to do most repairs on laptops, but I want some ides
    before I disembowel this thing.
     
    ken10254, Nov 29, 2010
    #1
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  2. ken10254

    BillW50 Guest

    In
    ken10254 typed on Sun, 28 Nov 2010 16:23:24 -0800 (PST):
    The internal screen resyncs? Ouch! Well only three things can cause
    that. The display itself (which I don't think is likely), the video
    cable, or the video chip which is probably soldered on the motherboard.
     
    BillW50, Nov 29, 2010
    #2
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  3. ken10254

    ken10254 Guest

    Hi Bill;
    I don't know if it resyncs, but it looks that way; a quick,jitter on
    the screen, but not on an external monitor. The LCD has been replaced
    by the previous owner.
    I assumed that, if it was the video chip, the problem would be on both
    monitors, but this only happens on the laptop's LCD. Do you think the
    video cable could be the cause. I could try to replace it if I can get
    the part. Any ideas where I could get one? Thanks for your thoughts.

    Ken
     
    ken10254, Nov 29, 2010
    #3
  4. ken10254

    BillW50 Guest

    In
    ken10254 typed on Sun, 28 Nov 2010 17:58:22 -0800 (PST):
    Hi Ken! Remember unlike desktops, laptops offers two independent
    displays and can display two totally different and individual displays.
    Most desktops can't do this without a second video card. So it is indeed
    possible that one laptop display might be fine while the other isn't and
    it still could be a fault in the video card.

    I don't know whether yours is on the motherboard or has a separate video
    card. So you should be looking for a motherboard or a video card and a
    cable going to the LCD. Best place to find this is on eBay. Look for one
    that is listed for parts and non-working. Of course you want one with a
    known good motherboard / video card and cable. It is usually cheaper to
    buy a whole laptop for parts than to buy the parts separately.

    I've been buying my computers is pairs for years now. And that assures
    you always have spare parts and no matter what happens, you can usually
    get up and going in a few minutes. No service contract can offer you
    faster and better service. ;-)
     
    BillW50, Nov 29, 2010
    #4
  5. ken10254

    ken10254 Guest

    Thanks Bill;
    I've found some video cables for it on ebay already, but not a dead
    laptop. That's a good idea! Broken screen or something like that.
    I'm going to tear it down in the next few days and see what I see.
    I'll post back later.
     
    ken10254, Nov 29, 2010
    #5
  6. ken10254

    ken10254 Guest

    Hi;
    Thanks for the thought. Was your backlight showing the same jitter
    that I described above? I've been using the laptop connected to an
    external monitor for the last two days with no issues, but as soon as
    I change screens to the laptop LCD, I get the flickering. It seems
    that the whole desktop tries to move up about 1/4" and back, but very
    quickly. Then it stabilizes for a few seconds and does it again. No
    real pattern, just a very annoying flicker which makes everything
    blurry while it is happening. Can a bad backlight do that? Any idea
    where I can get a replacement?
     
    ken10254, Nov 30, 2010
    #6
  7. ken10254

    ken10254 Guest

    Another question; is the backlight you mention the same as the
    inverter? This screen itself is almost new.
     
    ken10254, Nov 30, 2010
    #7
  8. ken10254

    BillW50 Guest

    In
    ken10254 typed on Tue, 30 Nov 2010 14:00:49 -0800 (PST):
    The backlight and the inverter only controls the backlight. It has
    nothing to do with the display besides the lighting. Screen shifting or
    any other problems besides lighting, has nothing to do with the inverter
    or the back light. If the inverter or the back light is bad, the screen
    will be completely dark except in bright sunlight, flashlight,
    spotlight, etc. and it will be very dim. Anything else it isn't the
    inverter or the backlight.
     
    BillW50, Nov 30, 2010
    #8
  9. ken10254

    BillW50 Guest

    In
    ken10254 typed on Mon, 29 Nov 2010 09:09:11 -0800 (PST):
    Exactly, keep us posted. ;-)
     
    BillW50, Nov 30, 2010
    #9
  10. Replace the cable. A common source of problem since it's subject
    to wear from opening and closing the display.
     
    the wharf rat, Dec 1, 2010
    #10
  11. Ummmm, how do you figure?

    If his vga chip was bad it'd fer sure happen on lcd and external
    monitors. Don't think the display (lcd itself) can cause this exact problem,
    but my bet'd be on the cable anyway.

    Get a new cable from ebay. Match the part carefully by checking vendor
    part numbers.
     
    the wharf rat, Dec 1, 2010
    #11
  12. ken10254

    BillW50 Guest

    In the wharf rat typed on Wed, 1 Dec 2010 18:38:21 +0000 (UTC):
    Simple Rat, laptops use dualhead video chips for two independent
    displays that can run at independent resolutions. You don't see them too
    often on desktop video cards, but you can get them if you want them.
    Nope not true. The dualhead video chip could be only bad for external or
    internal and work for the other one. Just like your stereo could have
    one bad channel and the other one works just fine.
     
    BillW50, Dec 1, 2010
    #12
  13. A) I don't believe you, because the ability to use an external
    display predates dual head cards. Even my Thinkpad 360 can mirror
    to an external monitor.

    B) The video cards (when they were discrete and not onboard) that
    shipped with laptops were exactly the same as the low end cards
    shipped with desktops. Sometimes underclocked. Nothing special.
    What would be the point of putting an expensive dual head setup in
    a cheap laptop that might never even see an external monitor?

    C) Units like the HP 7600 made a great big deal about having a dual
    head card that could actually support two indepenendent monitors by
    using a Y cable. So it was never a common thing.


    Bet you 10 bucks it's the cable.
     
    the wharf rat, Dec 2, 2010
    #13
  14. ken10254

    ~misfit~ Guest

    Yeah, BillW50 talks shite and is best killfiled. I've tried reasoning with
    him several times as he was giving out bad advice to people coming here for
    good advice. However it's like trying to push shit uphill with a pointed
    stick, he twists, he turns, he attacked character. See my sigfile, I was
    becoming like him. He was the inspiration for me digging up the exact quote.
    I'm with you on this one. It's not "a fault in the video card" (unless
    backpedalling Bill changes his definition of "video card" to include the
    ancillary devices like cables) and it's not the backlight. It's most likely
    a bad cable or a bad cable connection.
    --
    Shaun.

    "He who fights with monsters might take care lest he thereby become a
    monster. And if you gaze for long into an abyss, the abyss gazes also
    into you." Friedrich Wilhelm Nietzsche
     
    ~misfit~, Dec 4, 2010
    #14
  15. ken10254

    Bob Villa Guest

     
    Bob Villa, Dec 4, 2010
    #15
  16. ken10254

    BillW50 Guest

    In the wharf rat typed on Thu, 2 Dec 2010 03:06:02 +0000 (UTC):
    If you said differently, you would have been labeled as an impostor and
    it would be totally out of character for you. ;-)

    Even your Thinkpad 360 can mirror to an external monitor? Of course,
    mirroring is easy and anybody can do that with a single head video card
    and Y-cables. No special hardware required. My 1999 Toshiba 2595XDVD
    laptops also can only mirror displays as well. But back then dual head
    video was brand new and was very expensive. It isn't like that anymore.
    Dual head video is cheap. Where have you been? I just Googled some
    prices and they can be found for about 5 bucks a piece. So if a single
    head vs. a dual head video costs merely a few pennies more, what would
    you use in your products? Heck monochrome displays are still far cheaper
    than color displays. Yet the manufactures are currently using the more
    luxurious color displays, are they not?
    You are totally lost! Using a Y-cable will *not* get you two totally
    independent displays at different resolutions. Only two single head
    video or a single dual head video could do this.
    Cables do fail, but far less than you would imagine. There is a knack
    for building cables that will be flexing all of the time. The secret is
    how they are twisted together. Get it wrong and they break like
    toothpicks. Get it right and they never seem to break. And I wouldn't be
    dumb enough to bet it all on the cable itself. Unless of course it was
    you who built the cable. Then it would be a given. ;-)
     
    BillW50, Dec 4, 2010
    #16
  17. ken10254

    BillW50 Guest

    In
    Bob Villa typed on Fri, 3 Dec 2010 21:32:46 -0800 (PST):
     
    BillW50, Dec 4, 2010
    #17
  18. ken10254

    BillW50 Guest

    In ~misfit~ typed on Sat, 4 Dec 2010 13:14:17 +1300:
    Yup, acting all three as the three stooges! And I never gave out bad
    advice yet. But you do it on a daily bases. Isn't that so Shaun?

    By the way, when you mentioned that you use to setup sound equipment for
    concerts and was in big demand, I didn't want to tell you this. As I
    didn't want to hurt your feelings and all. But you clearly have shown us
    over and over again that you have no feelings whatsoever! So I guess it
    is okay to let you in on this little secret.

    The people who get those jobs are the ones that are really not so
    bright. As if you can change a light bulb all by yourself, you are more
    than qualified. And the dumber you are, the more in demand you will be.
    As it is really hard to find somebody really that dumb to do it again
    and again. ;-)
     
    BillW50, Dec 4, 2010
    #18
  19. ken10254

    Bob Villa Guest

     
    Bob Villa, Dec 4, 2010
    #19
  20. ken10254

    BillW50 Guest

    In
    Bob Villa typed on Sat, 4 Dec 2010 06:42:42 -0800 (PST):
    It sounds like gobs and gobs of drivel to you because you are a moron.
    Why would we expect you to understand anything? After all, you three
    stooges believes that a Y-video cable allows you to see two independent
    displays at different resolutions. I must say it takes real stupidity to
    show everybody how dumb you three really are. Most dumb people have
    enough sense to keep their mouths shut. ;-)
     
    BillW50, Dec 4, 2010
    #20
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