hardware/ software problem on boot
hardware/ software problem on boot
- Subject: hardware/ software problem on boot
- From: "Tony OCallaghan" <email@hidden>
- Date: Tue, 20 Jun 2006 13:45:36 +0100
Hi everyone, first I must apologise as i am unsure as to whether
this list is the best place to post this problem. But it is likely that
some of you guys would know the solution to my problem.
I have a
powerbook G4 firmware version 3. When i try to boot the machine It will
go throught the post initialisation and then turn off. When i try to
access the firmware i.e. cmd option f and o, the computer boots but it
does not go into the firmware. The only way to get into the open
firmware prompt is by using the command
nvram
autoboot?="false" in the terminal, this causes the machine to go into
the open firmware, however at the start it still requires me to hold
down the cmd + option + f + o. Upon further investigation I found that
just holding the cmd key will boot the machine (it doesn't however give
me the choice of operating systems to boot like it should). I tried
resetting the pram by using the command cmd + option + p + r, however
this did not work properly, I did however get the reset the pram while
in the open firmware prompt. This obviously did not fix the problem.
Then i tried to reset the nvram by using the command cmd + option + n +
v at startup, which actually brought me to the dialogue you would
expect when you hold down the cmd button only i.e. it brought me to the
dialogue where you can select which operating system you want to boot.
I reset the nvram when I was in the open firmware prompt which had no
effect. It cannot be a problem with the keyboard input boot driver
since when i'm in open firmware it recognises all the buttons on the
kayboard correctly.
Does anyone have an clue what is going on. It doesn't seem to be a problem with the firmware.
Thanks for any advise or help. \
regards,
tony
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