Okay, I realise my last reply wasn't particularly useful. Especially as I have no way to test voltages & such, and Herself is already warning me about the cashsink this machine is becoming.
What I've tried so far:
120Gb laptop hdd: it may as well not be there. no ill effect, doesn't spin up. I was curious.
via cf-pcmcia adaptor: 4Gb "microdrive" and 1Gb solid-state compactflash. The microdrive because it's what I've been planning on using, the CF because it should have minimal current draw. Both work fine
via cf-ide adaptor: same drive & cf, but DF1 is unbootable, and my mouse won't move (even at the boot screen!)
and out of nosiness sake .. the cf-ide adaptor with no cards plugged into it ... same result. no DF1, no mouse.
As the machine is quite happy to power two floppy drives and microdrive via pcmcia, I really hope I've ruled it out as a power drain.
So now I'm curious why the 2.5" drive didn't show up /spin up at all .. and wondering if I can sneak another cf-ide adaptor behind Her back.
(and fwiw, ks30 kicks)