Just checked the manual for my 164sx, and yes, it does
need the fan tach.
I'll scan the manual tomorrow and make it available.
Indeed the fan was the problem - connected a fan, and it immediately gave
some beeps - fooled with the jumpers a bit and up came the POST on
video - seems to be working.
The fellow I got it from thought he had a PDF manual for the board, but
forgot to bring it - I'll press him for it.
Now - if I could get VMS running on this, that would be fun!
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools:
www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html