Wierdest Screen Problems I've Ever seen.

Discussion in 'Mac Help/Tips' started by frescies, Jun 12, 2003.

  1. frescies macrumors regular

    Joined:
    Dec 9, 2002
    Location:
    Los Angeles, CA
    #1
    WHoa....

    I'm at my father's house trying to fix his computer and this is the wierdest thing I've ever seen....

    G4 450mhz (agp graphics)
    10.2.6
    512 RAM
    21" Studio display
    All peripherals disconnected
    PRAM zapped (several times)
    Permissions repaired
    Disk verified
    The only login item is transport monitor

    Ok. Computer boots up fine. Display appears fine as computer loads Jag (blue backround and everything appears fine). Then, all of the sudden, a half second after the desktop picture loads, the display appears to freak and suddenly is practically ALL BLACK with little red highlights around what would be the darkest parts of each icon and the text. It's frightening! So... Open up "Displays" in the preferences and the monitor has reverted to 256 color mode but retains all other settings that were there prior to restart. So... Change it to millions of colors and the screen now displays a NEGATIVE desktop (ie where the windows would show white with little blue horizontal lines, it now shows blue with little white horizontal lines), which is much more readable than what happens after login. Now, if I restart, it goes back to the black with red highlights and 256 colors.

    Problem with the monitor? Well... It gets better. My father recently installed a second harddrive on this machine, which has a relatively fresh copy of Jag. When I boot off of that volume, it works just fine! I've tried looking for some custom theme altering programs that might be causing the problem but I can't find any (perhaps I'm looking in the wrong place?).

    Evidently the computer was working fine until yesterday, then it went to sleep (as usual), and then upon waking it up, the problem started :(

    I'm perplexed!
     
  2. frescies thread starter macrumors regular

    Joined:
    Dec 9, 2002
    Location:
    Los Angeles, CA
    #2
    more...

    Ok it gets better.....

    Loging out makes the monitor normal, until you log back in again. And recalibrating the monitor fails each time :(
     
  3. rainman::|:| macrumors 603

    rainman::|:|

    Joined:
    Feb 2, 2002
    Location:
    iowa
    #3
    i would start by deleting all of his preferences. It sounds like something specific to his account, my guess would be there. Of course, he will lose all of his settings, but he'll retain all of his data...

    pnw
     
  4. Fukui macrumors 68000

    Fukui

    Joined:
    Jul 19, 2002
    #4
    yea, trash his library/preferences folder, log-in and log-out, if not, delete his user, and make another one, and log in as the new user...
     
  5. frescies thread starter macrumors regular

    Joined:
    Dec 9, 2002
    Location:
    Los Angeles, CA
    #5
    HAH!

    You guys are great!!!.... I made a new user off his account and when I logged into it, the screen was fine! I then went into his preferences in his User/library and looked for something suspicious. I came across com.apple.somethingsomethingsomething"coregraphics"

    I deleted the file and now it works just fine!!!

    Thanks a ton,
    My father will be pleased!
     
  6. zarathustra macrumors 6502a

    zarathustra

    Joined:
    Jul 16, 2002
    Location:
    Philadelphia, PA
    #6
    I can actually tell you how you can replicate this "error". Go to system preferences, go to Universal Access and under "SEEING", turn on "white on black". Now go to your Monitor prefs, and set it to Millions of colors. Is this what you saw? ;)
     
  7. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #7
    That's my guess too. That's immediately what I thought when he said it was a negative copy of the desktop.
     
  8. frescies thread starter macrumors regular

    Joined:
    Dec 9, 2002
    Location:
    Los Angeles, CA
    #8
    Nope...

    Close though.... Thats a true negative. The colors that I saw on his monitor weren't a true negative. They were all over the place, some of them a negative representation. Oddly though, his monitor kept failing to calibrate too. I assume the preference actually was broken, as this happened spontaneously, whilst no one was in system preferences.

    Oh man I'd feel stupid of that was the "problem" :D

    REAL STUPID.


    Thanks guys :D
     
  9. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #9
    This is not the sort of thing you'd accidentally do, but pressing Ctrl-Option-Command-8 will switch it over to White on Black too.
     
  10. jimthorn macrumors 6502a

    jimthorn

    Joined:
    Apr 24, 2003
    Location:
    Huntington Beach, CA, USA
    #10
    Re: Wierdest Screen Problems I've Ever seen.

    The undocumented "Hell" video mode. It's not a bug, it's a feature. :D
     
  11. jzieske macrumors regular

    Joined:
    Jun 28, 2003
    Location:
    Bloomington, MN
    #11
    Re: Re: Wierdest Screen Problems I've Ever seen.

    That is why I paid $129 for Jaguar.:(
     
  12. KentuckyApple macrumors regular

    KentuckyApple

    Joined:
    Jul 2, 2003
    Location:
    Chicago, IL
    #12
    just curious

    What (if any) are the practical uses for this "hell mode"?
     
  13. TEG macrumors 604

    TEG

    Joined:
    Jan 21, 2002
    Location:
    Langley, Washington
    #13

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