Can't boot after resetting PRAM??

Question

Before attempting to install Leopard, I upgraded my non-leopard compatible 1.2 GHz processor to a 1.8 GHz leopard compatible one. I also doubled my RAM from 512 to 1024 MB. I then installed leopard but upon restart it continually shut down. Holding down the "c" button at startup, I was able to boot from the leopard disc. I could then even start the computer from my old Panther startup volume. I used 'Disk Utility', ran 'disk repair' and reinstalled Leopard. The same problem persisted.
In another forum someone suggested resetting the PRAM as a next step. This I did but now I'm really freaking out because my computer is totally nonresponsive. My computer starts, I no longer hear that wonderful symphonic major chord, the Apple logo appears (with no circular loading bar), and there it remains frozen. I can no longer boot from the Leopard disc or any other disc (TechTool Pro, DiskWarrior). What should I try now?

Answer 1

japjunk wrote:
Before attempting to install Leopard, I upgraded my non-leopard compatible 1.2 GHz processor to a 1.8 GHz leopard compatible one. I also doubled my RAM from 512 to 1024 MB. I then installed leopard but upon restart it continually shut down. Holding down the "c" button at startup, I was able to boot from the leopard disc. I could then even start the computer from my old Panther startup volume. I used 'Disk Utility', ran 'disk repair' and reinstalled Leopard. The same problem persisted.
In another forum someone suggested resetting the PRAM as a next step. This I did but now I'm really freaking out because my computer is totally nonresponsive. My computer starts, I no longer hear that wonderful symphonic major chord, the Apple logo appears (with no circular loading bar), and there it remains frozen. I can no longer boot from the Leopard disc or any other disc (TechTool Pro, DiskWarrior). What should I try now?
There are several things you can do.
If you can’t start up after resetting PRAM
If you have a redundant array of independent disks (RAID) scheme set up, your computer may not start up if you reset parameter random-access memory (PRAM) when you restart.
If this happens, hold down the Option key while you restart your computer, and select your startup disk when you see the prompt.
f a message says “type ‘mac-boot’ and press return”
If the message “type ‘mac-boot’ and press return” appears when you try to start up your computer, some of your computer’s internal settings need to be reset.
NOTE: It may be helpful to print these instructions before you begin.
Or, try these suggestions:
■ Shut down your computer. Turn the computer back on and immediately hold down Command-Option-P-R, continuing to press until you hear the startup sound for the second time. This resets the computer’s parameter random-access memory (PRAM).
IMPORTANT: Resetting PRAM may change some system settings and preferences. Use System Preferences to restore your settings.
And finally
Restart with the X key
Hold down the X key and choose Apple menu > Restart. This may force the computer to start up using your Mac OS X system.
If the computer starts up, release the X key. Choose Apple menu> System Preferences, and then click Startup Disk. Make sure that the disk containing Mac OS X is selected.
Restart with the Option key
If you are unable to start up using the X key, choose Apple menu > Restart and immediately hold down the Option key.
When icons start to appear in the center of the screen, release the Option key. Select the disk that contains Mac OS X, and then click the forward arrow to continue starting up.
■ If resetting PRAM doesn’t solve the problem, reset non-volatile random access memory (NVRAM). When the “To continue booting ...” message appears, type “reset-nvram” and press Return. Then type “reset-all” and press Return.