HP (Hewlett-Packard) QR251US ユーザーズマニュアル
USB 3.0 board
NOTE:
When replacing the system board, be sure to remove the USB 3.0 board from the old
system board and install it on the new system board.
Description
Spare part number
USB 3.0 board
642762-001
Before removing the USB 3.0 board, follow these steps:
1.
Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
the computer on, and then shut it down through the operating system.
2.
Disconnect all external devices connected to the computer.
3.
Disconnect the power from the computer by first unplugging the power cord from the AC outlet,
and then unplugging the AC adapter from the computer.
and then unplugging the AC adapter from the computer.
4.
5.
Remove the following components:
a.
Bottom door (see
b.
)
c.
Optical drive (see
)
d.
)
e.
Heat sink (see
)
f.
Keyboard (see
)
g.
Bottom cover (see
h.
System board (see
Remove the USB 3.0 board:
1.
Position the system board right-side up.
2.
Remove the two Phillips PM2.0×3.0 screws (1) that secure the USB 3.0 board to the system
board
board
120 Chapter 4 Removal and replacement procedures