HP ProBook 4520s HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 64
Optical drive, Disconnect all external devices connected to the computer.
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3. Remove the memory module (2) by pulling the module away from the slot at an angle. NOTE: Memory modules are designed with a notch to prevent incorrect insertion into the memory module slot. Reverse this procedure to install a memory module. Optical drive NOTE: All optical drive spare part kits include an optical drive bezel. Description DVD±RW Double-Layer Drive with LightScribe (includes bezel) Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer (includes bezel) DVD-ROM Drive (includes bezel) Spare part number 598694-001 598695-001 598693-001 Before removing the optical drive, 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. 56 Chapter 4 Removal and replacement procedures