iMac 350 slot, firmware 4.1.9 problems

[legarem]

I tried to install OSX10.3 in my old Imac 350 slot. I had a message that told me that the internal program was obsolete so I tried to install the firmware version 4.1.9.

I downloaded it, installed it and restarted the Imac with the Pram swich pressed until I heard the sound.

The installation seemed to be ok but the Imac can't be started. When i press the front swich, I hear the same sound It did when I pressed the pram swich.

It doesn't boot.

Inserting a cd and pressing C to boot with the cd doesn't work.

What can I do now ?

Thanks

 

[legarem]

I found the problem

The Firmware 4.1.9 made my other party ram unable to work. I replaced the ram with another one and it now works.