Memory
Description Spare part number
Memory module (SODIMM), DDR-4, 2133 MHz
8 GB 820570-005
4 GB 820569-005
2 GB 851379-005
Memory module (SODIMM), DDR–4, 2400 MHz
8 GB 862398-855
4 GB 862397-855
2 GB 864271-855
IMPORTANT: Make special note of each screw and screw lock size and location during removal
and replacement.
Before removing the memory, follow these steps:
1. Shut down the computer.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the base enclosure (see Base enclosure on page 32).
5. Disconnect the cable from the battery.
If you are replacing a memory module, remove the existing memory module:
1. Lift the clear lm covering the memory module.
40 Chapter 5 Removal and replacement procedures for authorized service provider parts
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