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when you say freezeing, is it throwing a kernal panic message of does it just stop? Also do you have another mac from which you could boot this machine using fire wire target mode?
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when you say freezeing, is it throwing a kernal panic message of does it just stop? Also do you have another mac from which you could boot this machine using fire wire target mode?

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I would check the ram to ensure it is fully seated as that can be a cause of freezing. <br />
Also unplug, reseat all the internal cables as I have seen this occur if a cable has loosened which cuases a slight change in the way the pc sees thevoltage thus causes a freeze.<br />
<br />
Wes
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I would check the ram to ensure it is fully seated as that can be a cause of freezing.
Also unplug, reseat all the internal cables as I have seen this occur if a cable has loosened which cuases a slight change in the way the pc sees thevoltage thus causes a freeze.

Wes

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I am working with a Quad PowerMac G5, and it has been freezing every time I start the computer, often seconds after pressing the power button. <br />
<br />
I have tried starting up the computer in Open Firmware mode (command option O and F) to reset the ram, but before I can start the sequence (reset-nvram...set-default<wbr />s...etc.) the computer freezes.<br />
<br />
I have also tried to reset the PRAM, but the computer only resets again and then freezes.<br />
<br />
Finally, I have tried to boot Tiger with the intention of running repair/disk permissions, but, once again, it freezes before I can start the process. <br />
<br />
Any suggestions would be appreciated! Thank you
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I am working with a Quad PowerMac G5, and it has been freezing every time I start the computer, often seconds after pressing the power button. 

I have tried starting up the computer in Open Firmware mode (command option O and F) to reset the ram, but before I can start the sequence (reset-nvram...set-defaults...etc.) the computer freezes.

I have also tried to reset the PRAM, but the computer only resets again and then freezes.

Finally, I have tried to boot Tiger with the intention of running repair/disk permissions, but, once again, it freezes before I can start the process. 

Any suggestions would be appreciated! Thank you

PowerMac G5 freezes right after startup

Mac OS X is the desktop operating system from Apple Inc., found on Macintosh computers. OS X consists of a Mach/BSD-based kernel, operating system interfaces primarily based on FreeBSD and additional frameworks (written in C, C++ and Objective-C providing user interface and application-level services.

Mac OS X

Apple's early computers ran on a variety of operating systems, including a Pascal version and one based on CP/M, before releasing its ProDOS with the advent of its 16-bit computer. With the release of the Lisa, which had its own OS, Apple and computing entered the graphical age; it was followed by the Macintosh, which offered a series of "System" operating systems. Other Mac operating systems included PowerPC until Apple acquired NeXT and folded it into the Mac OS. Current operating systems for Apple devices are Mac OS-X and iOS.