Rev A iMav running 10.2.4 happily (and running 10.2.x since it was released.)

After a power outage the machine refuses to boot. I gets to the OS X grey screen with the propeller, spins for a while, the crashes. I get what appear to be two bands of interference across the screen and nothing works.

I can verbose boot and everything is fine until it starts to load the WindowServer.

There are no errors on the disk, and the HD will boot my G4 without a problem. I tried to boot off the 10.2 install CDs and I get the same crash.

I can boot and install the <un-named version> CDs, but cannot then boot off the HD.

Also, one other point, when the machine boots, even if the Startup Disk has been set, I get the ? _< folder -> ? seek while the imac looks for a boot drive.

Is there crucial information for OS X in the nvram that is preventing the boot? Could replacing the nvram battery solve this issue? It is a Rev A 233Mhz iMac, so the battery is what, 5 years old?

I cannot find any of my OS 9 boot CDs, so I've been unable to try that. OS 9 _IS_ install on the iMac, but I can't seem to get that machine to try to boot OS 9 (holding down the 9 key during boot does nothing).

Any ideas?

--
I'm no psychologist (although I play one when I'm picking up chicks over by the asylum)



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