no TFT lights on bootup on PB G3 Wallstreet, plz help!

Discussion in 'Mac Basics and Help' started by jofarmer, Mar 6, 2006.

  1. jofarmer macrumors member

    Jan 18, 2006

    I got a friends 233MHz Wallstreet (white Apple Logo) and he asked to upgrade it to the max. I added RAM to 192MB and installed OS X 10.2.8, both of wich is the supportet max.

    Now I got the USB2.0 PCMCIA card and wanted to see if all goes well - OS X boots, but when the grey background changes to the blue one with the white login window, the display switches off the lights completely! What is wrong?

    I tried zapping all there is (PRAM, NVRAM) and resetting it - no improvement.

    has anyone experienced similar things? And, preferably, found a solution?

    Thx a lot
  2. jeremy.king macrumors 603


    Jul 23, 2002
    Fuquay Varina, NC
    Try resetting the PMU

    Google also found this

    "The fix: Restart in Mac OS 9. Set the brightness (use the buttons) to around 75% brightness. Then use the Startup Disk control panel to switch back into Mac OS X."
  3. jofarmer thread starter macrumors member

    Jan 18, 2006
    Thanks, I already had tried resetting the PMU. Now in the apple doc I was not shure if I had done it right before, so I pressed all buttons for the duration of five seconds. Nothing changed.

    OS 9 is not installed on this machine.

    Maybe I should add that it runs on the a/c adapter and has no battery - but what would that change?

    And every time it boots up it boots with a happy mac for some seconds and then reboots to boot correctly into OS X.

  4. Sly macrumors 6502


    Nov 30, 2003
    Airstrip One
    You don't need to install os 9 just boot in to it once from CD. When you restart in OS X your problem will have been solved. This is a permanent fix providing your PRAM battery is good, if its dead you will have to boot in to os 9 first every time.

    You sometimes can get the back light to come on without booting in to 9 by pressing the screen brightness button, this isn't a permanent fix and you will find that you will not be able to wake the screen from sleep.

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