Merritt,
The 400 series KTUs are all dry caps, there is nothing I can think of that would contain a liquid unless there has been a liquid / high humidity issue (leaky roof, wet mop, broken water pipe, you know the drill). Green would normally mean corrosion due to induced moisture and battery.
Green Jello? I prefer lime.
Is this KSU in a high heat or corrosive area?
Basically the board is no different than any computer board of that vintage and the components are generically the same.
Good luck --- let us know what you see, jb.
KLD
