HP 255 G4, Maintenance And Service Manual

Page: 50 / 108

Memory module
Description Spare part number
8-GB (PC3L, 12800, 1600-MHz) 693374-005
4-GB (PC3L, 12800, 1600-MHz) 691740-005
2-GB (PC3L, 12800, 1600-MHz) 691739-005
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 battery (see Battery on page 28 ).
5. Remove the optical drive (see Optical drive on page 29 ), if installed.
6. Remove the bottom cover (see Bottom cover on page 35 ).
To remove a memory module:
1. Spread the retaining tabs (1) on each side of the memory module slot to release the memory module.
(The memory module tilts up.)
2. Remove the memory module (2) by pulling it away from the slot at an angle.
Reverse this procedure to install a memory module.
42 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts