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G4 boots into open firmware.

Posted on 2001-06-18
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Last Modified: 2008-03-03
A G4 450DP running OS9.1 after a clean system install boots directly into open firmware with the message

"open, unknown word
DEFAULT CATCH! code=300 at %SSR0 : ff80b070
%SRR1 : 00003030"

then lists the bootROM build details followed by

"Welcome to Open Firmware.
To continue booting type "mac-boot and return"

but no response from keyboard.
Any suggestions
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Question by:flexi
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4 Comments
 
LVL 30

Expert Comment

by:weed
ID: 6203766
Have you tried resetting the PRAM? Done a CUDA reset? Once booted you may want to check your software update control panel for firmware updates etc.
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Author Comment

by:flexi
ID: 6204709
PRAM has been zapped, cuda reset and a failed attempt to update to G4 Firmware 4.1.8.

I figure that the attempted update has damaged the
firmware boot info as indicated by

"open, unknown word
DEFAULT CATCH! code=300 at %SSR0 : ff80b070
%SRR1 : 00003030"

Can I restore the settings to default ?
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LVL 30

Accepted Solution

by:
weed earned 200 total points
ID: 6204758
Hmmm a failed firmware update. I think youre probably right about the cause of the error. Type "reset-all" at the open firmware prompt then restart. See if that changes anything.
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Author Comment

by:flexi
ID: 6205021
I managed to fix the problem by re-installing the firmware upgrade. The trick was to release the programmers button during the firmware install as soon as the long tone is heard and not waiting till the end of the tone.

 The bootup from the G4 was acheived by unplugging and the re-plugging the battery before booting.
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