The only tool required for this procedure is a Phillips screwdriver. While some models may look slightly different from the one shown in the illustrations, the steps for all models are the same.
Power Mac G5 hard drive removal instructions
The Power Mac G5 computer can accommodate two Serial ATA hard drives in its internal hard drive bay. In most configurations, a single hard drive occupies the top portion of the bay.
Open the computer case:
- Hold the side access panel  and lift the latch  on the back of the computer.
- Remove the access panel .
- Remove the air deflector .
Removing the failed Hard Drive(s):
- Release the drive locking tab by rotating it up 
- Disconnect the drive data cable  and power cable  from the hard drive.
- Pull the drive out of the drive bay , being careful not to touch the bottom of the drive.
Notes: If you encounter resistance, use a flatblade screwdriver to release the latches on the drive bay rails as you pull the drive out of the bay. (See circled areas on the illustration below.) If two drives are installed, remove the bottom drive first. To avoid damaging the printed circuit board (PCB), take care not to touch the PCB during installation.
- Remove the four guide screws on the sides of the drive.
Keep those screws for a new drive installation.
After drive was removed, carefully look at it. You may find few attached things that are not parts of the drive. Do not forget to remove and retain for future use all brackets and connectors or SATA adaptors from the drive, because they a not needed for data recovery process. Keep them for the new drive installation.
After you are done with the hard drive removal you may proceed to placing the data recovery order.