Looking for Silent 700 Model 765 lower board

[Cameron Kaiser]

These things must be cursed by G-d. I've landed three. Two had bad lower boards
(the ones with the bubble memory and the main 9980 MCU) already. The third had
a bad print mechanism. I replaced the printer mechanism, but the printhead on
that was bad, so I powered it down and replaced the print head. I power it back
up and its lower board suddenly stops responding too. Then, shortly after that,
the upper board! (What is that circular metal can bolted down with wires
exiting near the power switch? It squeals like a stuck pig.)

I have plenty of bubble memory boards from these damn units, but what I need is
 a working lower board itself. Unless someone is experienced with board level
repair and knows the typical faults on these.

-- 
------------------------------------ personal: http://www.cameronkaiser.com/ --
  Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
-- Don't you just hate rhetorical questions? ----------------------------------