Can anyone point me to documentation or schematics for this?
I have one in pristine condition, until last month when a capacitor blew...

Turns out these use the problematic Astec power supplies identical to
the ones used in the Osborne 01. There is a 0.1uF 250V polymer cap that
tends to blow. In fact, I've had 2 Osborne 01 machines that blew while
in service - smoke and all. I replaced the cap and now they work perfectly.

The Westwind, on the other hand, will not recognize the hard disk.
However the built-in ramdisk does work.

My fear is that when the cap blew, a voltage transient may have taken
out one or more of the large Shugart VLSI chips on the disk controller
board. These chips may be difficult to source these days.

-John