Is your "Wallstreet" a v1 or v2? I've played with pretty much all of them, and the v1 machines are by far the quirkiest. Anyway, if it's the 13" model, the displays in those are notorious for failing, usually caused by a bad cable. Of course, you'll want to make sure that the cable is properly attached before declaring it dead, which really can't be done until that heat shield is off. As for removing a stripped screw, I can't offer many suggestions that won't damage part of it. Vice grips are usually a last resort, if there's even anything for them to grab.
The Lombard is a different story. Those stupid Matsushita drives died all the time, so I have a stack of them sitting around. As for the CS thing, some drives are set to CS permanently, some drives have a switch, and some (usually OE stuff) are permanently wired as master or slave (usually annotated somewhere on the drive). But, since yours works except for booting, I'd guess that bus mastering isn't the problem. Lombards can just be uncooperative.
I've experienced the hard drive problem in my blueberry iBook before (back in 2002-ish), after I replaced its 3GB drive with a 10GB model I took out of my old 5300cs: it wouldn't do anything with it and Disk Utility didn't want to touch it. So, I had to pull it back out and reformat it with a friend's computer before it would recognize the drive. Afterward, it worked without a problem. You might try getting one of those USB-to-IDE converters (they're really useful), connecting the drive to a working Mac, and reformatting it there. Make sure to use the OS 9-compatible HFS+ partition table instead of MS-DOS, UFS, or GUID.
The Lombard is a different story. Those stupid Matsushita drives died all the time, so I have a stack of them sitting around. As for the CS thing, some drives are set to CS permanently, some drives have a switch, and some (usually OE stuff) are permanently wired as master or slave (usually annotated somewhere on the drive). But, since yours works except for booting, I'd guess that bus mastering isn't the problem. Lombards can just be uncooperative.
I've experienced the hard drive problem in my blueberry iBook before (back in 2002-ish), after I replaced its 3GB drive with a 10GB model I took out of my old 5300cs: it wouldn't do anything with it and Disk Utility didn't want to touch it. So, I had to pull it back out and reformat it with a friend's computer before it would recognize the drive. Afterward, it worked without a problem. You might try getting one of those USB-to-IDE converters (they're really useful), connecting the drive to a working Mac, and reformatting it there. Make sure to use the OS 9-compatible HFS+ partition table instead of MS-DOS, UFS, or GUID.