I'm deep into a restoration of a really nice Apple IIe. The machine came to me in semi-rough state, with a failed power supply, lots of dirt and grime, and just generally suffering from decades of neglect. Last week I recapped the PSU (my first-ever recap job!), which seems to have immediately resolved various functional / stability problems I was seeing with the machine, so that feels great.
Other than deep-cleaning the case and motherboard, my current focus is on the keyboard. The keys were pretty gross - covered in ancient sticky gunk (I suspect someone spilled a Coke or something similar onto it ages ago) and with several that didn't respond to presses (including the Caps Lock switch). I took the system apart yesterday and ran into a few immediate challenges:
1. The keyboard cable is FUBAR, with cracks in the ribbon and both plugs having separated / fallen off. Before bed last night I impulse-purchased a colorful replacement on eBay (should arrive early next week), but I'm uncertain if I bought the wrong type. Here's the item I bought - if anyone can validate whether it will work or not, I'd be grateful!
2. The keyboard itself shows signs of having been repaired (or at least worked on) in the past. A few of the key-switch posts are cream colored while the rest are black, and the screws that hold the keyboard onto the chassis are noticeably worn. I've cleaned it as best I can, but there's a lot of sticky gunk visible in-between the PCB and the metal plate (probably residue from that long-ago soda spill). Is there a way to separate the PCB from the metal plate without having to desolder / disassemble every key-switch?
3. As mentioned above, the Caps Lock key doesn't currently work. I've sprayed a little De-Ox into the mechanism and worked it up/down a bunch of times, but I won't be able to verify if it's working until I get a good replacement ribbon cable (hopefully next week, fingers crossed). If it turns out that the Caps Lock switch still isn't working, what would be my next steps there? Replacement? Disassembly? Any guidance would be appreciated!