HP Pro SFF 280 G9 Desktop PC Maintenance and Service Guide - Page 42

Power supply

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Page 42 highlights

1. Prepare the computer for disassembly (see Preparation for disassembly on page 18). 2. Remove the access panel (see Access panel on page 19). 3. Remove the fan duct (see Fan duct on page 33). 4. Remove the heat sink with fan (see Heat sink with fan on page 33). Remove the processor: 1. Pull the locking lever away from the processor (1), and then rotate the lever to its fully open position (2). 2. Raise and rotate the microprocessor retainer to its fully open position (3). 3. Carefully lift the processor from the socket (4). 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. Power supply To remove the power supply, use these procedures. Before removing the power supply, follow these steps: 1. Prepare the computer for disassembly (see Preparation for disassembly on page 18). Power supply 35

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1.
Prepare the computer for disassembly (see
Preparation for disassembly
on page
18
).
2.
Remove the access panel (see
Access panel
on page
19
).
3.
Remove the fan duct (see
Fan duct
on page
33
).
4.
Remove the heat sink with fan (see
Heat sink with fan
on page
33
).
Remove the processor:
1.
Pull the locking lever away from the processor
(1)
, and then rotate the lever to its fully open position
(2)
.
2.
Raise and rotate the microprocessor retainer to its fully open position
(3)
.
3.
Carefully lift the processor from the socket
(4)
.
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.
Power supply
To remove the power supply, use these procedures.
Before removing the power supply, follow these steps:
1.
Prepare the computer for disassembly (see
Preparation for disassembly
on page
18
).
Power supply
35