Hi,
I got the Kanga as non working: black screen, no start chime, but HD spinning a while (using known good power adapter).
And: when I put in a PC formated empty disk, it's ejected after a while as normal.
A known good PMCIA-CF adapter card doesn't start it.
As I have a working 3400, I changed display, speaker panel and keyboard for a test: nothing but silent noise from the speakers.
PMU reset: same noise.
I also used the PRAM battery from the 3400, but meanwhile it could have been empty.
So I changed these parts back and the 3400 still works (thanks to Apple!).
What I saw: the little PMCIA board inside (for ejecting) lied on the logic board, pins broken.
Next I tested the Kanga's HD with an IDE-USB adapter on my current Mac:
the HD spinned very slow and only short and in this case I always use a two-way USB cable, for getting more power to the HD.
And boing! The HD bombed my Mac!
It's definitely defective.
So I supposed, the harddisk also may have damaged the PMU board.
Now I got a NOS PMU board for the Kanga in UK. I'm living in Austria, the Kanga is from New York.
Today evening I plan to use the new PMU board and I'll know more, I hope.
So I'm praying, that the logic board is still alive!