Lenovo ThinkCentre A55 8705 Hardware Replacement Manual page 26

To replace the hard disk drive:
18
Hardware Replacement Guide
Important
When you receive a new hard disk drive, you will also receive a set of
Product Recovery discs. The Product Recovery discs will enable you to restore
the contents of the hard disk to the same state as when your computer was
originally shipped from the factory. For more information on recovering
factory-installed software, refer to "Recovering Software" in the User Guide.
1. Remove the computer cover. See "Removing the computer cover" on page 7.
2. Disconnect the signal and power cables from the hard disk drive.
3. Press the blue release tab 1 down, slide the hard drive cage 2 back, and
pivot it outward as shown.
4. Remove the hard disk drive cage from the chassis by simply sliding it
outward.
5. Pull on the blue handle 3 to release and remove hard disk drive from drive
cage.
6. Remove the hard disk drive from the blue plastic bracket by flexing the sides
of the bracket enough to slide it free of the hard disk drive.