"There are many ways a PC can crash each
    needing another style of rebooting. If it hangs
    but it's on, a reset will do."

I just had a hard-drive hang that had tied up a task doing disk
I/O (it seems to have failed a 'wake-up' from the power down
state)  - I  tried the "Reset" pushbutton but the HD was still hung
after reboot (this HD was on the 2nd IDE controller) ... it
finally took powering down to 'clear' whatever it was that was
'hung' in the HD ...

The moral :

      Peripherals can get hung that simple "Reset" won't clear.

(I've also seen this with other peripherals.)

Jim

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