HP EliteBook 840 G3 disassembly & assembly to change RAM, HDD, Wifi or 3G / 4G module

Introduction

This tutorial provides a comprehensive guide to disassembling and reassembling the HP EliteBook 840 G3. Whether you need to change the RAM, HDD, Wi-Fi, or 3G/4G module, this step-by-step guide will help you do it safely and effectively.

Step 1: Gather Necessary Tools

Before you start, ensure you have the following tools:

• Phillips screwdriver (size 00 is typically recommended)
• Plastic spudger or opening tool
• Anti-static wrist strap (optional, but recommended)
• A clean, flat workspace

Step 2: Power Down and Prepare the Laptop

• Shut down your laptop completely.
• Unplug the power adapter and disconnect all peripherals.
• If available, remove the battery for added safety.

Step 3: Remove the Back Panel

• Flip the laptop over so the back panel is facing up.
• Locate and remove all screws securing the back panel using the Phillips screwdriver.
• Use a plastic spudger to gently pry open the back panel, starting at one corner and working your way around. Be cautious not to damage the clips.

Step 4: Access the Components

Once the back panel is removed, you can access the internal components:

• RAM: Locate the RAM slots. To remove RAM, gently push the clips at either end away from the module.
• HDD: Locate the hard drive. Unscrew any securing screws, then slide it out of the connector.
• Wi-Fi Module: Find the Wi-Fi module, which typically has antennas attached. Unscrew and disconnect the antennas carefully.
• 3G/4G Module: Similar to the Wi-Fi module, unscrew and disconnect any cables.

Step 5: Replace Components

• Installing RAM: Align the new RAM module at an angle and press it down until the clips click into place.
• Installing HDD: Slide the new HDD into the connector and secure it with screws.
• Installing Wi-Fi Module: Position the new module and screw it into place. Reconnect the antennas.
• Installing 3G/4G Module: Follow the same procedure as the Wi-Fi module.

Step 6: Reassemble the Laptop

• Carefully place the back panel onto the laptop.
• Align it properly and press down gently to snap it back into place.
• Replace all the screws you previously removed to secure the back panel.

Step 7: Power On and Test

• Reconnect the battery (if removed) and plug in the power adapter.
• Power on the laptop and check if the new components are recognized:
  • For RAM, check system properties.
  • For HDD, ensure it appears in the file explorer.
  • For Wi-Fi, check network connections.

Conclusion

You have successfully disassembled and reassembled your HP EliteBook 840 G3, changing the necessary components in the process. Always remember to handle internal parts carefully and ensure the laptop is powered down before beginning any work. If you encounter any issues, refer back to this guide or seek further assistance. Happy upgrading!