I ran Compaq diagnostics, and USB controller passed, as did Refresh Timer.
My hard drive has 33.91 GB total, 5.73 GB or 16% free.
I defragged, and have 19% fragmented after defragging. The keyboard and trackball plugs seem solidly in their jacks. I think I have a spare trackball which I can substitute. I'll vacuum the keyboard,and see what happens.
Any idea on execution speed? It is frequently S-L-O-W-W-W!