Stuck with the apple and the scrolling gear while booting

Question

Hi there
i am using my mac for more than 2 years , i did not format it or even fix any thing into it but now something bad happend...
accdentaly my genius friend preesed the power putton for more than 5 seconds to start up the computer and i heared a sound and a the normal flashing light under the track pad and suddenly i was stuck with the apple gray booting screen and the scrooling gear and the computer does not go further .. i left for 2 hours and it still stuck with the same screen ... try to restart do any thing no results also ...
NOTE: THE BIG PROPLEM IS THAT I PUT A PASSWORD FOR THE FRIMWARE AND I FORGOOT IT SO I CAN NOT USE THE FOLLWOING:
1-the ability to use the "C" key to start up from an optical disc.
2-the ability to use the "N" key to start up from a NetBoot server.
3-the ability to use the "T" key to start up in Target Disk Mode (on computers that offer this feature).
4-Diagnostic volume of the Install DVD.
5-mode by pressing the Command-S key combination during startup.
6- a reset of Parameter RAM (PRAM) by pressing the Command-Option-P-R key combination during startup.
Requires the password to use the Startup Manager, accessed by pressing the Option key during startup (see below).
7- Safe mood.
8-Single mode acsses and the other one i forrgot its name.
SO I FIGURED THERE IS NO WAY BETER THAN THE PRIVIOUS WAYS TO SOLVE THE PROPLEM
IF YOU HAVE ANY IDEAS OR ANY THING SO I CAN FIX THIS THING ?
Thanks in advance >>>
iBook G4 Mid 2005   Mac OS X (10.4.8)  

Answer 1

I was mistaken about the PMU..with a little more digging I found that Open Firmware password can be removed if you change the amount of memory installed.
I found this info here: http://archive.macosxlabs.org/documentation/firmwaresecurity/faqs/faqs.html#remove_passwordprotection
The following is a link from Apple's site to download the user's manual for your iBook:
http://manuals.info.apple.com/en/iBookG4(Mid2005)_UsersGuide.pdf
It provides the instructions to add or remove memory from the machine. If you do have additional memory installed then you'll be able to remove the memory, and reset the PRAM, that way your password is gone. Hopefully from there we can figure out and fix your startup issue.
Ben