The drive seems that it doesn't even attempt to read anymore, so perhaps there is something mechanically wrong with it. As said, could be from the old disks I tried to run through it. One thing puzzles me. Normally, if I start the 1000 without the Kickstart disk in DF0:, it will display a screen asking for the Kickstart disk. Now, it just goes to a black screen no matter what. Disassembly is no problem; I've already opened it before.
Sounds like my Amiga 2000 until I replaced the motherboard. What happens when you disconnect the floppy drive (power and data cable) and try to boot? I don't know what it should do (if black screen is normal in that case), but if it asks for a disk at that point, then likely there's something electrically wrong with the floppy disk. If not, then maybe the motherboard or power supply.
