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HP ProBook 4420s Notebook PC - Removing and Replacing the Memory Module

Introduction

This document is provided to assist in removing and replacing the memory module for the HP ProBook 4420s Notebook PC.

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Minimum skill level

The End-User should possess product-specific knowledge and technical skill on how to service the system, and have familiarity with the operating system.

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Tools required

  • Small, Phillips-head (P1) screwdrivers.

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Parts required

NOTE: Part numbers are subject to change.

The replacement part number will vary depending on the memory module that is being replaced. If a part is listed as "Yes" under "Requires Return" then the defective part needs to be returned to HP. Click here for more information on returning parts to HP .

Description
Part Number
Requires Return
1GB, 1333 MHz, 240-pin, PC3-10600, shared DDR3-1333 SDRAM Small Outline Dual In-Line Memory Module (SODIMM)
598859-002
(Modified)
Yes
2GB, 1333 MHz, 240-pin, PC3-10600, shared DDR3-1333 SDRAM Small Outline Dual In-Line Memory Module (SODIMM)
598856-002
(Modified)
Yes
4GB, PC3-10600, shared DDR3-1333 MHz SDRAM Small Outline Dual In-Line Memory Module (SODIMM)
599092-002
(Modified)
Yes
NOTE: For customers in countries/regions with RoHS legislation* (e.g. EU, China, etc.) restricting the use of hazardous substances in electrical equipment. The use of the Original Spare part is regulated by RoHS legislation. If your unit contains a part that is labelled with the Modified Spare number, the Modified Spare must be ordered as the replacement part. If your unit contains a part that is labelled with the Original Spare number, please order the Original Spare as the replacement part. In this case either the Original Spare or the Modified Spare may be shipped which will not affect performance or functionality of the unit.

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Summary of instructions

To view a video demonstrating the procedure for removing the memory module, click on the link below. Or use the product video listing on the HP Services Media Library, Click here to go to HP Services Media Library , then select Memory module from the menu on the upper left hand side of the screen.

Click here to view the memory module removal video (right-click on the link to open in a new window/tab).

Memory module removal

  1. Review the safety considerations before performing the steps listed below by clicking on the following link:

    Click here to view the precautions .

    CAUTION: Failure to comply with the precautions could result in damage to your product or loss of data.
  2. Remove the battery and switch cover. Click here for instructions on how to remove the battery .

  3. Remove the three 3 mm P1 Phillips-head screws that secure the keyboard to the top cover.

  4. Remove the 4 mm P1 Phillips-head screw that secures the keyboard to the top cover.

  5. Slide the keyboard toward the rear of the notebook until the tabs on the front of the keyboard are free from their respective slots on the top cover.

  6. Flip the keyboard toward the right side of the notebook and rest it face down.

  7. Push both arms outward simultaneously to release the memory module to the spring tension position.

    NOTE: The primary and expansion memory slots are both located under the keyboard. The primary memory slot is located on the bottom and the expansion memory slot is located on top. If an expansion memory module is installed, it must be removed before the primary memory module can be removed.
  8. Grasp the memory module by the edges and pull gently to remove it.

    CAUTION: When handling a memory module, use care to prevent touching the memory chips on the board. Touching the memory chips could damage or destroy the memory.
  9. Place the memory module in an electrostatic dissipative bag.

Memory module replacement

  1. Grasp the memory module by the edges and remove it from the electrostatic dissipative bag.

    CAUTION: When handling a memory module, use care to prevent touching the memory chips on the board. Touching the memory chips could damage or destroy the memory.
  2. Locate the alignment notch on the memory module and align it with the memory module connector on the system board.

  3. Gently push the memory module into the memory module connector until it is secure.

  4. Push the exposed edge of the memory module down until you hear the click of the two retention arms.

  5. Flip the keyboard toward the center of the notebook and align the tabs on the front of the keyboard with the slots on the top cover.

  6. While pressing down on the front and rear edges, slide the keyboard forward until it is securely seated under the lip of the palm rest.

  7. Replace the 4 mm P1 Phillips-head screw that secures the keyboard to the top cover.

  8. Replace the three 3 mm P1 Phillips-head screws that secure the keyboard to the top cover.

  9. Install the battery and switch cover. Click here for instructions on how to install the battery .

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Parts return

If your part requires return then click on the appropriate link below:

Click here for the defective parts return procedure for US .

Click here for the defective parts return procedure for Europe .

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