HP DC7800 - Manual (Page 150)

Primary 3.5-inch Internal SATA Hard Drive
NOTE: The system does not support Parallel ATA (PATA) hard drives.
The preinstalled 3.5-inch hard drive is located under the power supply. To remove and replace the hard
drive:
1. Prepare the computer for disassembly ( Preparation for Disassembly on page 107 ).
2. Remove the access panel ( Computer Access Panel on page 113 ).
3. Rotate the drive cage to its upright position.
4. Rotate the power supply to its upright position. The hard drive is located beneath the power supply.
CAUTION: If the computer has a Smart Cover Lock installed next to the drive cage, carefully
route all cables around the Smart Cover Lock assembly as you raise the power supply to avoid
damage to the cables or lock.
138 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis