Cannot boot Power Mac G5 normally

Discussion in 'PowerPC Macs' started by ExTneicsol, Aug 21, 2016.

  1. ExTneicsol macrumors newbie


    Aug 21, 2016
    I have a Power Mac G5 Dual 1.8GHZ.

    Here's what happens :
    - I press the power button
    - I hear the apple boot sound
    - Nothing displays on the screen... I have no idea if it does something or not afterwards.

    Here's what works :
    - I press the power button and hold it for a long time (It boot up, does it's long beep, does the boot sound), then the Open Firmware screen appears.
    - I type "mac-boot" in the firmware and it boots normally (I can access OS X).

    I would like to restore the default behaviour of it booting normally without having to boot it from the firmware every time.

    I wonder if anyone could give me cues as to how to debug this problem.

    Thanks !
  2. Altemose macrumors G3


    Mar 26, 2013
    Elkton, Maryland
    I would perform two resets. The first of which is to reset the PMU, and to do that simply unplug the power cable and hold the power button for a good 10-15 seconds then plug it back in. Also, do a PRAM reset by holding CMD-OPT-P-R right after you press the power button until you hear the chime a second time.

Share This Page