HP ENVY TouchSmart Ultrabook CTO 4t-1100 HP ENVY 4 Sleekbook HP ENVY 4 Ultrabo - Page 58
Memory module
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2. Gently hold down the media card reader board (2), and remove the RTC battery (3). NOTE: The RTC battery is attached to the system board by foam material rather than doublesided adhesive. Reverse this procedure to install the RTC battery on computer models. When installing the RTC battery, make sure the "+" sign faces up. Memory module Description 4-GB memory module (PC3, 12800, 1600-MHz) 2-GB memory module (PC3, 12800, 1600-MHz) 8-GB memory module (PC3, 12800, 1600-MHz) Spare part number 641369-005 652972-005 670034-005 Before removing a memory module, 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 display panel (see Display panel on page 39). 50 Chapter 4 Removal and replacement procedures