desertrout
Well-known member
I've got a couple 800k drives that will spin up a known good system disk to the happy mac icon, but then eject the disk. I'm doing my testing on the one that I've recapped, cleaned, lubed, and cleaned the heads (several times), but the behaviour is the same between the two. The upper head bracket (whatever you call it) is not bent on either, so they should be making good contact with the disk. I've tried the drives on several different Pluses with the same results, and working drives work as expected on all of those same Pluses, so it doesn't appear to be a logic board or power issue. I'm just realizing now that I haven't tried swapping cables (I don't think, at least not intentionally)...
The head assemblies don't move when I insert the disk. They do move back to 0 after inserting the disk if I move the assembly ahead a bit beforehand, so I know the motor is working enough to do that. I've messed a bit with track 0 positioning on the one to see if it makes a difference, but it appears that the original position was correct (found the extremes in either direction, i.e. when it just shows the 'x' icon).
At this point, it feels like I'm just casting around in the dark. Is there a likely cause here? It seems others in the forum have experienced this as well, but I haven't seen a solution yet.
The head assemblies don't move when I insert the disk. They do move back to 0 after inserting the disk if I move the assembly ahead a bit beforehand, so I know the motor is working enough to do that. I've messed a bit with track 0 positioning on the one to see if it makes a difference, but it appears that the original position was correct (found the extremes in either direction, i.e. when it just shows the 'x' icon).
At this point, it feels like I'm just casting around in the dark. Is there a likely cause here? It seems others in the forum have experienced this as well, but I haven't seen a solution yet.