Reseting NVRAM turns computer off
Power Macintosh G4 (Quicksilver 2002)
Dual 800 processors
128MB Memory
Boot ROM: 4.33f2
OS: 10.1.3
The previous logic board had the dual processors blown, for whatever reason. I replaced the logic board, tested the memory and other components, all seem fine.
The Apple Hardware Test CD tests everything fine.
It boots up and runs into the OS fine .. sometimes.
Sometimes the computer will begin to power on, then immediatly turn off. This happens about three times before I can get it going, then it works fine.
If I try to reset the PRAM, it begins to turn on, then it turns off.
I can get into the Open Firmware prompt, do the reset-nvram, I get an OK. When I type reset-all, it gets to the second line (I think it says Flashing ...) and then it immediately turns off.
I can duplicate the computer turning off when I try to reset the PRAM and reset-all every time.
Is there a way to perhaps re-flash the firmware?
Where is the PRAM actually located--mainboard, correct?
Any help would be great!
I tried a different battery, and I also tried the software tools to zap the PRAM; however, the same problem persists. I even tried the little button on the mainboard.
I also get a notice in OS X that:
Speaker Connection: The device plugged into the speaker port is not recognized. Please unplug the device and plug it back in again.
I tried with and without the speaker plugged into the mainboard and I get the same error on every boot.
No sound either on boot. Never have, forgot to mention that one.
I'm beginning to be afraid that the mainboard is shot....
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You have posted in the Feedback About New Discussions forum.
As you are a first time poster, you seem to have missed the text at the top of this forum that says:
Please Read This Before Posting Here
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[solved] can't turn computer off
hello!
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ariel.
Last edited by ariel (2009-08-24 14:11:11)well it seems that's not a hardware problem (feww.. )
because when I turn the computer off as narada wrote:
Shutdown without X: sudo init 0
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then it something in the definitions.
I want to find the problem by doing boot log. so I tried to do what T-Dawg wrote in http://bbs.archlinux.org/viewtopic.php? … 88#p113288:
T-Dawg wrote:
if your talking about the messages that appear after the Arch Wombat message but before the daemons load try renaming /etc/rc.sysinit to /etc/rc.sysinit2 and create a new /etc/rc.sysinit file with the same permissions as the original. In this file put:
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Make sure that new file is executable.
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