It's time to disassemble the 486 DX2 66Mhz (https://www.youtube.com/watch?v=Szv40UBmABY) and take a look at the battery damage.
I'll go over the components as we disassemble the unit, and will be cleaning up the motherboard after it suffered a leaked battery.
Finally I'll install a soundblaster, reassemble the system and play some MicroProse Formulate One Grand Prix.