HP ProDesk 400 G7 SFF, Maintenance And Service Manual

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4. Carefully lift the processor from the socket (5).
IMPORTANT: Do not handle the pins in the processor socket. These pins are fragile, and handling them
could cause irreparable damage. If pins are damaged, you might have to replace the system board.
The heat sink must be installed within 24 hours of installing the processor to prevent damage to the
processor’s solder connections.
To replace the processor, reverse the removal procedures.
NOTE: After installing a new processor onto the system board, always update the system ROM to ensure that
the latest version of the BIOS is being used on the computer. You can find the latest system BIOS on the web at:
https://support.hp.com/us.en .
Power supply
To remove the power supply, use these procedures.
Before removing the power supply, follow these steps:
1. Prepare the computer for disassembly ( Preparation for disassembly on page 21 ).
2. Remove the access panel ( Access panel on page 21 ).
3. Remove the optical drive ( Optical drive on page 22 ).
4. Remove the front bezel ( Front bezel on page 23 ).
5. Remove the drive cage ( Drive cage on page 29 ).
Remove the power supply:
1. Disconnect the power supply P1 (1), P2 (2), and P3 cables (3) from the system board.
42 Chapter 4 Removal and replacement procedures ENWW