HP 255 G3, Руководство по техническому обслуживанию и ремонту

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USB board
Description Spare part number
USB board (includes cable) 749649-001
Before removing the USB 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.
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.
4. Remove the battery (see Battery on page 31 ), and then remove the following components:
● Keyboard (see Keyboard on page 35 )
● Top cover (see Top cover on page 43 )
● WLAN module (see WLAN module on page 51 )
● System board (see System board on page 56 )
● Hard drive (see Hard drive on page 49 )
To remove the USB board:
1. Position the computer upright.
2. Disconnect the USB board cable from the system board (1) .
3. Remove the tape that secures it to the cable to the base enclosure (2) .
4. Remove the Phillips PM2.5×5.0 screw (3) that secures the USB board to the base enclosure.
5. Remove the USB board (4) .
Reverse this procedure to install the USB board.
Component replacement procedures 59