Boot Open firmware without Apple Keyboard

Hi there, are you using these 4 keys...

Windows + Alt + o + f

Great news, thanks! 🙂

I'm holding this keys also but I get nothing, what could be happening?
I'm new to apple. I've a power mac g4 m8570 since last week, somebody gifted.
It's not booting, so i would like to install something from cd.

Thanks in advance

Hello kikeenrique, and a warm welcome to the forums! 🙂

Is it an Apple KB or Windows KB?

Is it Wired or Wireless?

It's not booting, so i would like to install something from cd.

With an Install Disc in the drive, hold the c key down & see if it boots off it.

Thanks a lot.

It's a wireless windows kb.

I forgot to mention, but I' got booting it in verbose mode, reseting vram... So the computer is receiving key press.

Getting an Install Disc is another pending question.
My first option is trying to install an ubuntu/debian powerpc, that's why I would like to enter openfirmware.
Other option is find an Install Disc for this Mac, but I have no clue where to get it.

Thanks 😀

Tiger Requirements...
To use Mac OS X 10.4 Tiger, your Macintosh needs:
* A PowerPC G3, G4, or G5 processor
* Built-in FireWire
* At least 256 MB of RAM (I recommend 1GB minimum)
* DVD drive (DVD-ROM), Combo (CD-RW/DVD-ROM) or SuperDrive (DVD-R) for installation
* At least 3 GB of free disk space; 4 GB if you install the XCode 2 Developer Tools (I recommend 20GB minimum)
http://support.apple.com/kb/HT1514

See Tom's, (Texas Mac Man), great info on where/how to find/get Tiger...

http://discussions.apple.com/thread.jspa?messageID=9755670&#9755670

Or Ali Brown's great info on where/how to find/get Tiger...

http://discussions.apple.com/thread.jspa?messageID=10381710#10381710
Leopard requirements/10.5.x...

* Mac computer with an Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor

minimum system requirements

* 512MB of memory (I say 2GB at least)
* DVD drive for installation
* 9GB of available disk space (I say 30GB at least)

On this one you can call Apple & see if they have any left.

I finally installed leopard, using a combination like cmd alt+o+fc, so I'dont know if I really get to openfirmware.
If it is a menu where you can choose between hd and cd, I did it.

Good work, that screen is normally gotten to by just using the Option/alt key.