I think you have a problem that demands that you start all over, including trying a second HD, removing backup battery, a PMU reset, Open firmware PRAM reset and OS reinstall (aka a clean reinstallation) and failing that trying a new PMU card. My WS II did display some strange behaviour regarding power management at times. It could be that your machine have a PMU close to failure or a similar problem. Or it's a boot rom problem, so I'd try with a second CPU daughter card as well if nothing else resolved the issue.
Alright, some clarity and things I have tried that have not solved this issue.
It's NOT the memory test - I've got that disabled on all my Macs.
One of my Wallstreets (originally 233/512k) has been upgraded to a PowerLogix 466 w/ 384 MB of RAM. I've replaced the PMU, charge card, and power supply card. My PRAM battery is dead, so every time you cut power, it's equivalent to resetting the power manager and/or removing the PRAM battery altogether. Any combination of stock and replaced parts results in the same symptoms.
The other Wallstreet is a stock 233/512k with 192MB of RAM. It has the same problem. (It also has a dead PRAM battery.)
I suspect replacing the PRAM battery will solve the problem, but I haven't bothered.
Peace, Drew --
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