I can relate to that disassembly of a LJ 1...
When I was 17, I wanted to make an upgrade to my IBM Aptiva PS/2. Yes, the one that came with Windows 95 and OS/2, and let you choose between the two. (I still have those OS/2 disks shrink-wrapped somewhere).
So, I wanted to have a new HDD. Nothing fancy, getting a 20GB IDE unit installed where the original 1.2GB was should be a breeze. Except it wasn't. Both hardware and software had issues:
The first part: Hardware. It's not an standard ATX cabinet. The motherboard doesn't have PCI sockets; instead it has an huge riser with all the boards slapped on it: sound, network, modem and the HDD are all hanging on that riser. Thank IBM for manuals, because it told me I HAD to remove all of that, along with 32 bolts. As you turned the riser UPSIDE DOWN, the CD-ROM and HDD caddy were strapped in there. So, I got to them, and finally removed the failing HDD.
Mom walks in and asks me "Will you be able to put everything together?" to what I take a look up and there are PCI board pieces EVERYWHERE. I half jokingly wave the thick IBM manual at her; "Sure, all in the manual." I never managed to convincingly lie to mom before. She bought it.
I slap everything back together. Everything strapped and working, minus 18 bolts. The thing could take an earthquake, survive an atomic blast with that much over-engineering. Screw it, I got 18 spare bolts. You gotta give IBM the credit, that thing was sturdy.
Now the 2nd part: software. IBM's BIOS couldn't handle the 20GB HDD, not even 8GB in fact. Nothing a quick flashing won't solve. Flash the BIOS, all good, at least it acknowledges there is an HDD in there. It won't boot with a 20GB partition, but fdisking the sucker to a 8GB partition and Windows manages to complete the setup.
It took me a good 5 hours to go through all that, and I managed to get a running PC with Win 95 as per IBM specs with 18 spare bolts.