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Weird Green Blocks

By petesaul ยท 9 replies
Feb 8, 2009
  1. Hello

    I don't know if anyone can help. When running video in certain instances I get these weird green checked squares - especially over black areas of the screen. A strange example of this is I can stream video fine within the normal in You Tube, but the checkerboard pattern occurs when I enlarge or full-screen it.

    Any ideas?

    (I can't post a screenshot as I don't have a high enough post count yet)

    I am using a Dell Vostro 1500 laptop with NVIDEA GeForce 8600MGT grpahics card.

  2. lamo

    lamo TS Rookie

    this is dead videochip. if your laptop is warranty covered, take it to service-centre. if not, you can only replace mb, or replace videochip, if you have equipment.
  3. mflynn

    mflynn TS Rookie Posts: 2,655

    Only with Videos?

    This can happen if the Video file is damaged, if so it will breakup at the same place in the video each time.

    If the above is not true then...

    I would consider installing the latest Video drivers from Dell especially if they are newer than you have. Or if the same reinstall.

  4. TheConqueror

    TheConqueror TS Rookie Posts: 19

    yes i would not automaticaly assume that your chip is dead how often does it happen have you tried

    playing a dvd in widescreen check the dark areas to see if you get the same result. Is it an aftermarket

    graphic card or did it come with the system if aftermarket i would diag taht use dxdiag from run menu


    will run you through all the basic video tests choose display from the menu and let it work its magic.

    remember youtube video is not the best quality if you have firefox get video download helper grab the video and test it on a stand alone player like media player classic (K-Lit mega codec pack)
    keep us updated XD
  5. wii-ste

    wii-ste TS Rookie Posts: 163

    Try playing the video windowed and then again full-screen. If the green blocks move and resize with the video then I would suggest that the file is corrupt.

    This is often seen when you download a file and there are errors that were non-correctable or also on DVD's with small scratches, however it is quite likely to occur on YouTube or any any other video sites too.
  6. lamo

    lamo TS Rookie

    mflynn, you should know, that if you'd play videofile, the codec uses videomemory for frame buffer and possibilities of videochip. also, you should know, that 86xx,84xx series of nvidia chips(g86-770-a2,g86-630-a2) is very fulnerable to overheating, and thus, it dies exactly this way.
  7. red1776

    red1776 Omnipotent Ruler of the Universe Posts: 5,223   +163

    thats a very common side effect of an overheated video card/chip
  8. mflynn

    mflynn TS Rookie Posts: 2,655


    Yes I do, but I don't assume that without first considering the many other software/driver/malware plus more, things that could be the cause first!

  9. lamo

    lamo TS Rookie

    i don't know any malware/software issues, which cause such things. anyway, it'd be better if the thread starter upload some photos of this mess.
  10. Tedster

    Tedster Techspot old timer..... Posts: 6,000   +15

    no - this can be a lot of things.

    1. Bad codec and video file is not being decoded correctly - could be a bad file as well

    2. bad, corrupt, or outdated video driver

    3. bad video chip (least likely)
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