I found this mint condition Emac by the trash Wednesday. It's a G4 1.25 GHz, 512MB RAM, 80GB HDD and 32MB Video Card. I took it home to find out nothing was seriously wrong with it (nothing a few resets couldn't take care of). It has 10.4.11 installed on it and I wanted to wipe the system clean and install 10.5.6 Leopard. I soon find out that my Leopard DVD has a major crack in it. So I call up another friend and have him bring me over his Leopard DVD so I can have a clean operating system.
I put it in and all the sudden the screen starts flashing and not loading anything. I wait a minute to see if anything happens but it just kept flashing solid blue colors. I shutdown the Emac and when I turned it back on it just sits at the loading screen with the apple logo. I let it sit for around 20 minutes and it continues to so called "load". I later find out from him that the DVD he gave me wasn't a retail version of Leopard. It was a hacked version for use on intel computers! Somehow this really screwed up the computer, because now it just sits at the loading screen all day. I've tried a PMU reset, zapping the PRAM 3 times, doing the open firmware reset (reset-nvram, set-defaults, reset-all) and leaving the computer off and unplugged for a day. I've also tried single user mode, but when I try to restore the Emac that way it keeps repeating a string with "unsupported" written at the end. It repeats this many of times before finally freezing. It won't allow me to boot from cd/dvd either, not from holding the C key down or trying to boot a disc using open firmware. Because of this I only have access to open firmware and single user mode.
My friend says I need to do a hard reset of the EFI, does anyone here know how to that? If you can't do a hard reset of the EFI, is it possible to hard reset the logicboard? I remember with my Pentium 4 I messed around with the bios to the point the computer wouldn't turn on. I read online to remove the jumpers on the motherboard and keep the computer unplugged for an hour so it can discharge. Thus doing a hard reset of the bios. This worked wonders for resetting the bios on the Pentium 4 to factory defaults. Is there anyway to do a logicboard reset like I was able to do on the Pentium 4?
Any help is greatly appreciated.