Another recent acquisition. I have tried this on two Macintosh SE computers and am not seeing any signs of life. I cannot insert a floppy either as it goes in only so far and then meets resistance. Anyone familiar with this sort of thing and what troubleshooting I can do on it to see whether it is indeed dead or just seized up? It looks clean inside from what I can see, no obvious signs of any component leakage or burn outs.