HP ProBook 4320s Notebook PC HP ProBook 4321s ... - Warranty Life

l. Top cover (see Top cover on page 91)m. Power connector and cableWhen replacing the system board, be sure that the following components are removed from thedefective system board and installed on the replacement system board:● Memory module (see Memory module on page 57)● WLAN module (see WLAN module on page 71)● WWAN module (see WWAN module on page 64)● Modem module (see Modem module on page 93)● Processor (see Processor on page 80)Remove the system board:1. Position the computer right-side up with the front toward you.2. Remove the T8 slotted-Torx 2.5×5.0 screw (1) that secures the system board to the baseenclosure.3. Disconnect the USB board cable from the system board (2).4. Use the ODD connector (3) to lift the right side of the system board from the base enclosure (4).5. Lift the system board up and to the right to remove the system board (5).Reverse this procedure to install the system board.96 Chapter 4 Removal and replacement procedures