I tried to fiddle with the PLL switches as per the link above, but it still seems to be running at 867Mhz.

I've tried checking with Powerlogix's CPU Director (2.3b4 under OS 9.2.2), but it crashes (something about PPC memory mapping).

"sysctl hw.cpufrequency" in a terminal reports 867000.

As it's a 0-ohm resistor, I did what was suggested and just dropped a piece of solder across the "1" switch of the "1" PLL (the 4th row from the top). I then tried moving the resistor from the "0" position in this row to the "1" position, also still at 867Mhz. The computer still boots fine, so I can't be too far off, but suspect I haven't quite got something as it should be.

Here's a cross link to the powerbook forum here: viewtopic.php?f=21&t=22063

I'll make further posts there, since it's the more correct forum. Thanks for the help/advice so far.