There is a reset switch, just under and to the left of the on/off switch.
Here's what the manual says: "The Reset switch resets the system (regardless of the microcode status) and forces the power off. Use this push button to power off when power is not completely off or the microcode is in a hung state."
From what this says, I think I would turn on the computer and get to that "stuck" state, and then take a poke at the reset switch to "power off", and then try to reboot again, pressing F1.
Wendy
April 2006
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