Cannot use any MAC OS X Start up commands

Hi

I have an iMac in the office that I cannot format. I try to boot from DVD, try to boot in single user mode, and it seems that these are disabled

I cannot reboot with DVD because I do not have the password. Someone did a number on this machine.

Help!

iMac
OS X 10.4
indsupportAsked:
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mccrickConnect With a Mentor Commented:
If so, then I believe you can remove the memory, turn it on and then put the memory back in.
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mccrickCommented:
Does this explain your issue?

http://support.apple.com/kb/ht1352
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indsupportAuthor Commented:
This seems to be the exact problem


How do I remove this

Just remove ram and then turn on then put back and turn on?
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schapsCommented:
depends on the model, exactly, but if it's a relatively recent model, there is a little door on the bottom edge accessible with two screws. There may be one or two chips in there. You just need to make some change. If there are two, take one out, start it up, shut it down, put the chip back. That should wipe out that Firmware lock.
You can get exact information on how to do this to your particular model at:
http://support.apple.com/kb/ht1423
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indsupportAuthor Commented:
Worked PERFECTLY!!!
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schapsCommented:
what? no love for my efforts? glad you got it, but don't forget to tip your waiters.
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