PowerBook Screen randomly goes black

Discussion in 'Macintosh Computers' started by livingfortoday, Apr 24, 2005.

  1. livingfortoday macrumors 68030

    Joined:
    Nov 17, 2004
    Location:
    The Msp
    #1
    Ok, I'm having a really weird problem with my PowerBook. About a week ago the screen started going black for no apparent reason when it was on battery power. I could still kind of see stuff on the screen, and it was still barely useable, but it was incredibly dark. The equivalent of turning down the contrast all the way, where you can still kind of see stuff on screen, but it's really impossible to get any real work done that way.

    I have no idea what is causing this, it just happens when I'm on battery power, not when any particular program is running or anything. It happens completely randomly, too, sometimes it'll be five minutes, sometimes half an hour between occurrences. If I put it to sleep and wake it up the screen is back to normal.

    Again, I have no clue what is causing this, and haven't found anyone with a similar problem yet. Any suggestions?

    Oh, the PowerBook is a 667Mhz PowerBook Ti.
     
  2. GTJ macrumors newbie

    Joined:
    Apr 23, 2005
    Location:
    dublin
    #2
    Me too!

    This happens to me too with my ibook!!? I dont know what causes it and i normally just put it to sleep and wake it again. Doesnt happen as often as it use to, but still every once in a while.
     
  3. JupiterTwo macrumors 6502

    JupiterTwo

    Joined:
    Mar 29, 2003
    Location:
    GB
    #3
    yeah - I get this with my iBook. A few taps to the back base of the screen usually brings it back, or some movement of the lid.
    I guess it's something is lose/trapped, but I haven't gotten round to taking it apart yet.

    I did wonder whether it was linked to some logic board problems (my iBook has been back twice), but I couldn't be bothered to send it back this time.
     
  4. sandercox macrumors newbie

    Joined:
    Jul 17, 2002
    Location:
    NL
    #4
    On an iBook it is a cable in the hinge that breaks. Very frustrating problem and quite expensive to have it repaired ~125 euro's and the people at my local store also broke the airport cable while replacing... and a few months later the normal display cable started to act up. So actually my iBook has al of its cables replaced that go through the hinge.
     
  5. iGav macrumors G3

    Joined:
    Mar 9, 2002
    #5

    Sounds like what happens when your computer puts the display to sleep, (not the computer, just the display) it dims but doesn't darken completely allowing you to still (just about) see what on the screen.

    The screen should 'wake' back up as soon as you use the track pad, click a key or move a mouse.

    Have you checked your 'Engery Saver' settings? As a test... set you machine to highest performance for both Power and Battery, and make sure that you set you computer to NEVER go to sleep, and do the same with the display setting directly underneath, and see if that has any affects.

    G
     
  6. Rincewind42 macrumors 6502a

    Rincewind42

    Joined:
    Mar 3, 2003
    Location:
    Orlando, FL
    #6
    Nah, it sounds like his backlight is unhappy. Mine is currently doing the same thing, and has been worse (the screen was a uniform gray for a couple of days before this). I hope it's just a broken cable, last time something bad happened to my display it cost me over US$1300 :(
     
  7. Dagless macrumors Core

    Dagless

    Joined:
    Jan 18, 2005
    Location:
    Fighting to stay in the EU
    #7
    my windows laptop does something similar, the screen flickers quite fast at some screen angles. my guess is its a faulty connection, most likely in the hinge.

    but im no computer doctor, just a puzzled fellow myself
     
  8. Sutekidane macrumors 6502a

    Sutekidane

    Joined:
    Jan 26, 2005
    #8
    Most of the time, this problem is caused by a damage power cable to the backlight. The problem is that power and video have to go through a delicate cable and through the hinge, which you know is a moving part. Well, heat in that area, which is stupidly where the exhaust vents are and the repetition of opening and closing the screen caused the cable to wear our and eventually stop working.
     
  9. livingfortoday thread starter macrumors 68030

    Joined:
    Nov 17, 2004
    Location:
    The Msp
    #9
    I'm just wondering why it does this only when on battery power, though. If it was the cable connecting the screen, wouldn't it always be doing this? Not just when it's on battery?
     
  10. Sutekidane macrumors 6502a

    Sutekidane

    Joined:
    Jan 26, 2005
    #10
    In this case it sounds like a very different issue relating to the logic board.. can't help you much further.
     

Share This Page