Sounds like a neat little project. First, give it a gentle sweep with a soft brush or a can of compressed air so you don’t push dust deeper into the slots. Then, with a magnifying glass, check for any corrosion or loose components—those old capacitors can be fragile. If you want to see what it still “holds,” we could try a quick power‑on test, but be sure the board’s power supply is clean and within the 486’s limits. It’s a slow, careful process, but I’m happy to help you go through it step by step.