Hi I to have an emac 1.25 7447? with the same issue as Alex McKeever I tried replying to the tread but when I hit reply it seemed to just delete my post. You will no doubt receive another 2 versions of this shortly :-) I try and answer the same questions you posed Alex Is this the 1.25 GHz retail model (Radeon 9200) or the 1.25 GHz education market model (Radeon 9600)? I think it's a 9200 Are you able to see the GRUB menu? I could get the grub menu prior to the blank screen When does the screen turn black? Mid boot After the screen turns black, does there appear to be further disk activity? I believe there was Are you using Mini-VGA or the built in display? Built in though I have a mini-vga adaptor Has this machine ever used something like Screen Spanning Doctor, which enables extended desktops instead of mirroring in Mac OS X? Not that I know of If so, have you tried resetting the NVRAM (which will temporarily disable the extended desktop patch until applied again)? Yes after running the adelie ppc full CD and getting the blank screen. :-( I have a freebsd install on the machine and it boots (or booted) from open-firmware. When I booted adelie by holding the c key freebsd started open-firmware. The CD booted and I got a blank screen mid boot but it has stuck. Rebooting left me with the same blank screen. I tried to boot open-firmware but got nothing so I press the pmu and rebooted with the open-firmware keys I got open-firmware then the sad-mac icon and then freebsd started. It then rebooted it's self and reverted to the black screen and I can't seem to revive open-firmware again (yet). I hope it's not bricked :-( You said “just about any modern Linux distribution”; do older ones work? Can you provide a list of what does and doesn’t work, so that we may narrow down kernel versions? Up to Debian 7.11 work later models install but boot to black screen, even with video=ofonly I think the was a debian bug about modules that stops systemd loading but I don't want systemd so never looked that hard. I also have an othe ppc machines that I could possibly try. imac G3 333Mhz 256MB 2 Emac G4 1Ghz G4 800Mhz iirc G4 867Mhz iirc this maybe a digital audio overclocked 17" imac White Half Sphere G4 1.25 GHz PowerPC 768 MB 20" imac G5 PowerPC 1.8 GHz 2GB Kelsoo