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Tom, Mac Support Specialist
Category: Mac
Satisfied Customers: 675
Experience:  8 years experience as a Mac administrator for a college
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After a power failure, G5 is asking for password XXXXX the password

Customer Question

After a power failure, G5 is asking for password XXXXX the password XXXXX not work
Submitted: 7 years ago.
Category: Mac
Expert:  Tom replied 7 years ago.
HelloCustomerand thanks for using

You might need to reset the power management.

To reset the SMU on a Power Mac G5 simply do the following:

Turn off the computer by selecting Shut Down from the Apple menu or by holding the power button until the computer turns off.
Remove the power cord from the computer.
Wait two minutes.
Plug in the power cord.

I would also reset the pram. To do so do the following:

Step 1: Shutdown your computer

Step 2:   Locate the following 4 keys on the keyboard: Command (Apple key) , Option, P, and R. You will need to hold these keys down simultaneously in step 3.   You must do step 3 prior to the Apple logo from appearing on the screen otherwise you must shutdown and try again.

Step 3: Turn on computer and immediately hold down the Command (Apple key ) & Option & P & R key all at the same time.   

Keep holding them down. The computer will restart and on the third time you hear a chime you can let go and your computer will start up as normal.

Let me know if this helps
Customer: replied 7 years ago.
Hi Tom,
Sorry, I had a court case- very time consuming and drainging. Getting back to daughter's Mac. Followed your advice -tried to reset SMU same black screen appeared. Along the top it says, Darwin/BSD (imac-G5. local) (console) then underneath, login: . Tried to reset pram by shutting down, then turning on, holding command, option, p,r - and enventually got to a blue screen with the little spinning wheel and eventually back to the black screen.
Expert:  Tom replied 7 years ago.
Lets try starting up in single-user mode.

1. Shut down the computer if it is on.
2. Press the power button to start the computer.
3. Immediately press and hold the Command (Apple) key and the "s" key for single-user mode. (Command-S)

This will give you white text on a black screen.
Type fsck -fy press enter

If it finds errors run the command fsck -fy until it fixes all the errors.

When it is finished, just type reboot to restart your computer.