bolix ADB box

Dear SLUGgies,

the power-up button in my Symbolics keyboard's ADB box doesn't work reliably;
it feels kind of sticky, and doesn't work at all times.
I opened the box, but found nothing obviously wrong.
My kludge is to keep a Mac keyboard handy, and swap the two keyboards
just for the duration needed to power up the Mac. Annoying.
Can you recommend a solution?

I intended to plug both keyboards at the same time, but I read in the manual
that this could cause the Mac's ADB controller to fry, and my friend water
fried his 950's motherboard's ADB during an incident that looks quite like it.
Happily, I had only one ADB cord, so I was prevented from trying that,
until I found the warning in the MacIvory manual. Is there a known fix to
this problem? If I find an ADB cable and plug an apple keyboard on the
other ADB port of the Mac, instead of on the same, will it also fry
the motherboard?

Yours freely,

[ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ]
[  TUNES project for a Free Reflective Computing System  | http://tunes.org  ]
Your conscience never stops you from doing anything.  It just stops you
from enjoying it.