PowerBook Duo 210 Tracking ball problem

HI everyone! I was walking by a quite neiberhood and saw a garage sale on the street. I saw a beautiful Powerbook duo 210 and I bought it for 30 USD with the original charger! It powers up! But it has a problem with the tracking ball. Only it moves from the right to the left but almost nothing from up to down. So I cant do so much... The problem it's that I don't have the duo dock to connect an external mouse! This was a very limited Macintosh regarding the ports without a duo dock!

i Was looking for help to:

1) system 7.1 shortcuts (to avoid using the tracking ball and do something)

2) is there any fix to the trackball problem? The mac works perfect! But has that annoying problem!

thanks in advance!

Carlos

Answered! View the answer I have this problem too

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Well it's been quite a while since I used one of these. Seems like there were contacts that would get dirty and needs cleaning. There are rollers in it that would get gummed up. I think I used a pocket knife to scrape them off then a q-tip dipped in alcohol.

If you ever worked on an old Apple mouse, you unscrewed the retaining plate by turn a quarter turn to the left and removing and you would see the roller after you took the ball out. You may need to clean the ball too.

Here's some info you might need in the future: https://archive.org/stream/manual-apple-...

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Carloselvis will be eternally grateful.
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