On Jul 6, 2010, at 10:49 PM, John Carmonne wrote:
I got it fixed I don't understand this I had to reinstall the OS to get it working The FW nor the internal optical would boot, I took all apart and reset the CUDA, the full Monty, even switch out the RAM, every thing I could think of. So to get the installer to boot I put the image on a 8 GIG stick and booted on USB and did the reinstall. Now every thing is working.
This makes no sense to me. If you can't boot the optical drive, and you can't boot the HD, and you also can't boot a KNOWN WORKING Firewire drive, this is DEFINITELY a firmware issue, NOT a System software issue. The fact that you seemingly "fixed" your problem with a System software reinstall from a USB drive seems to me to be COINCIDENTAL and not indicative of a real "cause & effect" solution. I'm glad you solved your problem, but I don't believe your solution was the solution.
I would bet that if you'd booted the USB stick installer, and gone directly to Startup Disk and selected the normal HD as the startup device it would probably boot without the need to reinstall everything. Unless you tried that, we'll never know, but at least Startup Disk is WRITING to the NVRAM which is the part of the firmware that controls the boot, and it would be a possible "real" solution to your problem. When you do a reinstallation it also writes to NVRAM to set the newly installed System as the boot device for the initial reboot after reinstallation. I believe that it's the "writing to NVRAM" that solved the problem, and not the reinstallation itself.
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