I managed today to really screw up my ibook. So bad that even resetting the PMU and zapping the pram wouldn't work anymore.
I fooled around with the openfirmware(apple's bios) and managed to make the system unbootable. The chime startup sound worked but the screen stayed black. There was nothing what i could do, so i already thought the logical board was broken.
I luckily found a german site who posted the solution to this problem, this is really a complete hardcore reset.
1. Remove the battery
2. Hold down apple+power button, you'll be hearing a strange beep and the standbylight will flicker, you'll going to hear the chime sound after that. Keep holding down the apple+powerbutton and eventually the os-rom-bootmanager appears
3. Enter ’mac-boot’
4. iBook should be workin now
If it still displays a black screen, try this
1. Remove the battery
2. Hold down apple+power button until the os-rom-bootmanager appears (don’t enter quotes on commands)
3. Enter ’reset-defaults’
4. Enter ’set-defaults’
5. Enter ’reset-all’
6. Enter ’mac-boot’
The last solution worked for me. Pfew......................
What i have learned? I'll never touch the openfirmware again..
Full Version: What to do if you really screwed your mac up
throw it away and get a pc! 
QUOTE(Jizzylax @ Aug 3 2004, 01:24)
throw it away and get a pc!
Definitely!
QUOTE(Jizzylax @ Aug 3 2004, 03:24)
throw it away and get a pc!
Lol, i have a pc already, infact more then one. The apple is my laptop.
QUOTE(Darkest Genesis @ Aug 2 2004, 23:03)
QUOTE(Jizzylax @ Aug 3 2004, 01:24)
throw it away and get a pc!
Definitely!
thanks for the biased opinions there, you could do the same thing fucking around too much in the bios
thnx. this might be usefull. I was planning on fooling around with the open firmware next week or so..
Wow. I've never messed with the firmware. As soon as I bought a mac I stopped messing around with my computer. In fact, that's the reason I bought it, I was totally sick of constantly fucking with my XP rig.
Anyways, try searching macosxhints, I"m sure there's plenty of information about resetting the firmware.
Anyways, try searching macosxhints, I"m sure there's plenty of information about resetting the firmware.
i was playing around with a "towers of hanoi" open firmware implementation 
QUOTE(Leopold Stotch @ Aug 20 2004, 11:32)
i was playing around with a "towers of hanoi" open firmware implementation
http://www.kernelthread.com/publications/firmware/
Amit Singh is uber
Damn, that is hardcore for a Mac. I hope that I never have to do that. Info is very very helpful though. Thanks!
QUOTE(DJP @ Aug 2 2004, 23:15)
I managed today to really screw up my ibook. So bad that even resetting the PMU and zapping the pram wouldn't work anymore.
I fooled around with the openfirmware(apple's bios) and managed to make the system unbootable. The chime startup sound worked but the screen stayed black. There was nothing what i could do, so i already thought the logical board was broken.
I luckily found a german site who posted the solution to this problem, this is really a complete hardcore reset.
1. Remove the battery
2. Hold down apple+power button, you'll be hearing a strange beep and the standbylight will flicker, you'll going to hear the chime sound after that. Keep holding down the apple+powerbutton and eventually the os-rom-bootmanager appears
3. Enter ’mac-boot’
4. iBook should be workin now
If it still displays a black screen, try this
1. Remove the battery
2. Hold down apple+power button until the os-rom-bootmanager appears (don’t enter quotes on commands)
3. Enter ’reset-defaults’
4. Enter ’set-defaults’
5. Enter ’reset-all’
6. Enter ’mac-boot’
The last solution worked for me. Pfew......................
What i have learned? I'll never touch the openfirmware again..
I fooled around with the openfirmware(apple's bios) and managed to make the system unbootable. The chime startup sound worked but the screen stayed black. There was nothing what i could do, so i already thought the logical board was broken.
I luckily found a german site who posted the solution to this problem, this is really a complete hardcore reset.
1. Remove the battery
2. Hold down apple+power button, you'll be hearing a strange beep and the standbylight will flicker, you'll going to hear the chime sound after that. Keep holding down the apple+powerbutton and eventually the os-rom-bootmanager appears
3. Enter ’mac-boot’
4. iBook should be workin now
If it still displays a black screen, try this
1. Remove the battery
2. Hold down apple+power button until the os-rom-bootmanager appears (don’t enter quotes on commands)
3. Enter ’reset-defaults’
4. Enter ’set-defaults’
5. Enter ’reset-all’
6. Enter ’mac-boot’
The last solution worked for me. Pfew......................
What i have learned? I'll never touch the openfirmware again..
QUOTE(zxybgsyxz @ Aug 8 2004, 00:56)
QUOTE(Darkest Genesis @ Aug 2 2004, 23:03)
QUOTE(Jizzylax @ Aug 3 2004, 01:24)
throw it away and get a pc!
Definitely!
thanks for the biased opinions there, you could do the same thing fucking around too much in the bios
easy now what do you expect from a board titled IEX
apples are ok, i just would never use one.
Woah!! Thanks DJP! I was already seeing my iBook G4 in the trash bin. I also messed up "big time" in OpenFirmware and the exact same symptoms happened. I already gave up after trying to reset PRAM, resetting the power manager, holding down the power key while booting and all of that. Nothing happened. Of course without my iBook I didn't have any internet so i called up my brother ( thanks mar ) and somehow he found this forum thread. And yup holding down Power + Apple did the job. Thanks again DJP!
Just out of curiosity: I didn't find this tip anywhere in the internet. How did you come up with it? Did u just try all key combinations?
hogliux
Just out of curiosity: I didn't find this tip anywhere in the internet. How did you come up with it? Did u just try all key combinations?
hogliux
QUOTE(hogliux @ Dec 7 2007, 04:43)
Woah!! Thanks DJP! I was already seeing my iBook G4 in the trash bin. I also messed up "big time" in OpenFirmware and the exact same symptoms happened. I already gave up after trying to reset PRAM, resetting the power manager, holding down the power key while booting and all of that. Nothing happened. Of course without my iBook I didn't have any internet so i called up my brother ( thanks mar ) and somehow he found this forum thread. And yup holding down Power + Apple did the job. Thanks again DJP!
Just out of curiosity: I didn't find this tip anywhere in the internet. How did you come up with it? Did u just try all key combinations?
hogliux
See kids, this is why it's good to share your fuckups with the rest of the class...
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