Ah, plastic tabs. I swear everything inside the LC II is held in with them. It sure makes taking all the stuff out easy, but it does make you a little nervous. Luckily it's fairly obvious the ways they're supposed to bend to get stuff out and they're very easy to see, so there is less chance of accidental breakage.
I took the LC II motherboard out and swapped my LC III board into the case, which is surprisingly clean, maybe all the dust is getting stuck on the fan (it's pretty dusty), today since a brief inspection confirmed fairly obvious capacitor leakage in multiple place(I'll post some pics later for reference). It looks like there's a little corrosion on some IC pins too so it's due for some kind of help.
So, for starters what's the best way to clean off the gunk/goo/residue? Also, is there a good way to get the capacitors off the board (mostly the metal can ones with plastic bases)? I figure I won't be using the board anytime soon so removing the caps and cleaning off what gunk I can is the best I can do for now. It still boots so far so hopefully nothing's damaged beyond repair.