Compaq Presario CQ57-300 Presario CQ57 Notebook PC Maintenance and Service Gui - Page 67
USB board, to which the USB board cable is connected, and then disconnect
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USB board Description USB board (includes cable) Spare part number 646128-001 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 39), and then remove the following components: ● Optical drive (see Optical drive (select models only) on page 40) ● Keyboard (see Keyboard on page 49) ● Top cover (see Top cover on page 52) Remove the USB board: 1. Release the ZIF connector (1) to which the USB board cable is connected, and then disconnect the USB board cable (2) from the system board. 2. Remove the Phillips PM2.5×6.0 screw (2) that secures the USB board to the base enclosure. 3. Remove the USB board (3) and cable. Reverse this procedure to install the USB board. Component replacement procedures 59
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