3 Replies Latest reply: Mar 28, 2008 5:00 PM by manymoods
garvondavis14 Level 1 (0 points)
The last few days the display (maybe the whole computer?) has been randomly turning off on me and the light on the open button turns on, as if my computer is sleeping or closed. Sometimes it takes a few taps on the spacebar to turn back on and sometimes it takes me closing the computer and waiting. If i do have to close it, the computer seems to recognize that it's closed because the light on the open button gets brighter. I have messed around with the power settings and turned the settings so that nothing ever goes to sleep, but this seems to do nothing. Sometimes this happens over and over again, and other times it will only happen every few hours. Anyone have any ideas what could be going on? This is driving me nuts.


Powerbook G4, Mac OS X (10.5.1)
  • KatieK904 Level 1 (0 points)
    I've had the same thing for the past week or so. Normally, I have my PB hooked up to a monitor and keyboard. When I take it from my desk and use just the PB (plugged in), it randomly goes to sleep even more frequently (every couple of minutes). I notice it first shuts me out of iChat and then within 30 seconds or so, goes to sleep. I've reset the power management, but that didn't help at all. Any suggestions?
  • Ian G1 Level 1 (0 points)
    I am having the very same problem. It began this week.

    Now every so often my Powerbook randomly goes into sleep mode, when I click on the mouse she wakes up.

    I am at a loss as to why this is happening, but found this thread


    Looks to me like a fiasco and a nightmare.

    I'm thinking it could be the main battery inside the computer causing problems with the temp readings and causing a safety feature to kick in, but that's a guess and I do not know know what to do to fix it yet.

    I'll get back if I can figure it out.
  • manymoods Level 1 (10 points)
    I have had the same problem lately, in detail like you. I'm also suffering from the "bridget Riley" symptoms with vertical lines appearing on the screen. I have 3 now, some people have 67!!!! This only happens to PowerBooks 17", G4 with serial numbers starting W85. You can read more about it on
    <post edited by Host>

    Just thought that the 2 problems could be connected? Check your serial number ( "About this Mac" and click "Info") and let me know.