I realy need help here but first let me run down all that I 've done in four days with this Machine. **I have replace the Battery the in the unit it was dead. **I have disconnect everthing hard drive, ram, battery let Machine sit for 24 hours. nothing. I removed the Hard Drive installed it my Machine everything looks good Well lets change that to all the files are there. I can't boot to that drive, so I ran it as a slave. (saved my sisters files at lest.) I have Install firmware upgrade 4.1.9 in the Startup folder of the systems folder. Replaced it Back in the Imac still nothing. Imac starts up but just a black screen I don't even hear the crt crackle with static discharge. **Now I am not sure about this but but can it be that the PMU was screwed up when OS X was installed or tryed to be installed without the firmware update. and it can't turn on the PAV and also that the PRAM screwed up.One thing I forgot to state is there are no startup chimes. I do here the harddrive spinning thats about it. *Is it possible to install OS 10.3.7 on this drive from inside my machine and then install it back in the Imac or is this thing dead in the water. *I have not reset the PRAM. Well that is it for now any help thanks. Wait I boot up My G-4 With this harddrive by itself I have a folder with a flashing Question Mark What does this mean. shut everthing down and Bootedup Install disc for my G-4 at this time I was able to see the hard drive it seems to me there are two Systems folders and the Firmware upgrade ids nowhere to bwe found. Can I reinstall OS 9 on this harddrive from my disk and will it work in the Imac. Note The Imac has 0S 9.0.4 install.