Hey, I recently aquired a PowerMac G4 MDD (Dual 1GHz, no FW800) on EBay. 2x 256 MB of 333 MHz RAM, an empty Maxtor DiamondMax Plus 9 80 GB IDE drive and the orignal (I assume) LG DVD drive. I don't know what the IDE drive is formatted as since I aquired it seperately. I still have a Mac OS X.5.0 Leopard DVD+DL (non-model specific) around that I - if memory serves - used to boot a PowerBook G4 1GHz in the past. I also downloaded Leopard X.5.4 from a internet source and created a DVD+DL install disc from that, using High Sierra's disc burn function in the Finder (I read that Toast wouldn't work) using that .dmg file. Problem is that neither of these two DVDs seem to boot. Starting the machine I always get the ? logo on a Mac. Also the fans spin up like crazy. At first I thought the DVD drive doesn't have power, but I can use the eject button to eject the disc, so that can't be it. I also tried different jumper settings. On the DVD drive the jumper was in the mid position and I left it there. I don't know what a master or slave setting would be though since there is no description on the drive. The Maxtor disc has instructions and I tried both master and cable select. The latter is recommended in Apple's own official support documents (set cable select and position the disc on the end of the IDE cable, which I did). One problem I have is that I don't have an original Apple mouse or keyboard. Probably because of that holding the mouse button during startup does nothing (to open the DVD drive) as well as holding Option (to select a boot device). The mouse is a CSL vertical mouse, the keyboard a Microsoft Wired Keyboard 600, both connected via USB in the two back ports. I am not sure if either of them are recognized, but I have used both peripherals just fine on newer Intel Macs in the past. Does anybody have a hint for me? Can the MDD G4 even boot a Leo DVD? Or do I have to use something older?