-
All replies
-
Helpful answers
-
Dec 26, 2013 5:13 AM in response to BDAquaby TheMacMini09,It's definetly NOT a firmware password. I have already tried all of the methods of resetting it (removing and adding RAM, resetting it in OS X, etc.) and there is definetly not one there. I have also done an SMU reset (press the button on the motherboard). And no, I'm not getting that image. It seems very strange, because another one that I have laying around works perfectly fine...
-
Dec 26, 2013 9:40 AM in response to TheMacMini09by BDAqua,Hmmm, seems to be pointing to a corrupt NVRAM, but I know of no way of fixing or overcoming that.
-
Dec 26, 2013 9:51 AM in response to TheMacMini09by rccharles,This is a mystery indeed.
I recently got a PowerMac G5 Dual 2.5 GHz (7,3) from a friend of mine, and I would like to dual-boot it between Tiger (or Leopard) and Debian PPC. However, every time I try to bring up the boot menu (hold ALT/option at boot before chime) there is simply a black screen. Same happens when I try to boot to Open Firmware (hold CMD-ALT-O-F); just a blank screen.
I press these keys then I poweron the machine.
When I try to boot from the Debian CD, it's almost as though it is ignored, as I am put straight to OS X, but I can boot from the Panther/Tiger DVDs
cd was not compatible with the PPC. If the firmware does not find a compatible os on the cd, the cd is ignored. Try cd on another ppc.
Here are some idea:
1) Check for a later version of open firmware. Install.
2) Decide how much you want to mess with the machine. could turn it into a door stop.
4) Use unix nvram command to examine firmware variables. Maybe one is set incorrectly.
5) There are unix commands for partitioning hd. They are in 10.4.11 and later.
6) Install a boot manager. When I installed Linux on my iMag g3 600, the linux install put a boot manager on my linux partition. I created three partitions on the machine. I didn't need the linux boot manager. I didn't figure out all the ins and outs of the linux boot manager, yaboot.
Robert
-
-
Dec 26, 2013 10:13 AM in response to TheMacMini09by rccharles,Possible this is sometype of video problem with the firmware video driver ... hence the blank screen.
Robert
-
Dec 26, 2013 10:33 AM in response to rccharlesby BDAqua,AHA, I wonder if this is a flashed PC card?
-
Dec 26, 2013 11:21 AM in response to BDAquaby TheMacMini09,BDAqua wrote:
AHA, I wonder if this is a flashed PC card?
Nope. Default Apple card.
-
Dec 26, 2013 11:22 AM in response to rccharlesby TheMacMini09,rccharles wrote:
Possible this is sometype of video problem with the firmware video driver ... hence the blank screen.
Robert
I think it may be this, but still, why would there be a problem with a factory video card?
-
Dec 26, 2013 11:33 AM in response to BDAquaby rccharles,You can view and change nvram variables from the terminal. See man nvram
Try a different video card and display that are known to work with startup manager.
-
Dec 26, 2013 12:22 PM in response to TheMacMini09by BDAqua,I forget in this long thread, but if it boots to a blank screen holding alt key, if you have an Install Disc inserted, or a bootable external drive, or another bootable partition...
Wait 30 seconds or so on the blank screen, press Right arrow then press enter.
-
Dec 26, 2013 12:28 PM in response to BDAquaby TheMacMini09,OK, at this point, I am almost certain it is the video card. I will swap the one from another PowerMac G5 (one year earlier) soon, but in the mean time, I will try your idea:
BDAqua wrote:
Wait 30 seconds or so on the blank screen, press Right arrow then press enter.
I will reply ASAP, but, you know, Christmas...
-
Dec 26, 2013 4:56 PM in response to BDAquaby TheMacMini09,Nope, didn't work. Just a blank screen. I'll go about replacing the video card tomorrow, but I'm off to bed now.
-
Jan 3, 2014 4:49 PM in response to BDAquaby TheMacMini09,Well, I replaced the graphics card and it works! Must have been something wrong with the card. Thanks so much for your help!
-
Jan 3, 2014 6:38 PM in response to TheMacMini09by BDAqua,Good work, great to hear, thanks for the report!
-