HP EliteBook 840 G2 WWAN module replacement

Step-by-step HP EliteBook 840 G2 WWAN module replacement rewritten in our own words from HP's Maintenance and Service Guide, with page citations.

Part you need790198-001HP WWAN module, HP lt4112 LTE/HSPA+ 4G 790198-001 for the HP EliteBook 840 G2
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On this page
  1. Applies to
  2. Tools and parts
  3. Preparation
  4. Replacement
  5. Parts this procedure uses
  6. Manufacturer manual
Source: steps rewritten in our own words (no more than 8 words in a row copied; part numbers, screw sizes and warnings kept as printed) from HP's Maintenance and Service Guide (PDF, printed pages 58–65). Not bench-tested. We have not performed this repair; keep HP's manual open for its illustrations. Scope restrictions below are part of the guide: do not apply it to other models, generations or configurations. Service manuals are written for trained technicians; work at your own risk.

Labels: DOCUMENTED = taken from HP's manual; PROPOSED = our own joining or ordering of HP's directions, not an HP instruction; UNPERFORMED = a suggested check that has not been carried out.

Applies to

HP EliteBook 840 G2. Confirm the exact model on the service label before starting.

HP EliteBook 840 G2 Notebook PC WWAN module replacement. HP prints this procedure on printed page 64 of its maintenance and service guide.

Tools and parts

  • Screwdrivers and a non-marking pry tool as HP lists for this procedure
  • Static-safe work surface
  • 790198-001 - HP lt4112 LTE/HSPA+ 4G Module for use only on HP ZBook 14 G2 Mobile Workstation computer models. Source: printed page 64.
  • 793116-001 - HP lt4211 LTE/EV-DO/HSPA+ 4G Module for use on all computer models. Source: printed page 64.
  • 740011-001 - HP lt4112 LTE/HSPA+ 4G Mobile Broadband Module for use on all computer models. Source: printed page 64.
  • 748599-001 - HP hs3110 HSPA+ Mobile Broadband Module for use only on HP EliteBook 840 G2 Notebook PC and HP EliteBook 740 G2 Notebook PC computer models. Source: printed page 64.

Preparation

Save your work and shut the computer down through the operating system, unplug AC power and every external device, and work on a clean, grounded, ESD-protected surface while sorting each screw by its original location. Handle every cable by its connector and put each one back in its own place during reassembly.

Replacement

  1. Power the machine down. If you cannot tell whether the machine is off or in Hibernation, turn the machine on, and after that shut it down through the operating system. (printed page 58).
  2. Cut the power from the machine by unplugging the power cord from the machine. (printed page 58).
  3. Detach every external device from the machine. (printed page 58).
  4. Take the service cover off (the Service cover section is on page 57). (printed page 59).
  5. Take the battery out (the Battery section is on page 59). (printed page 60).
  6. Detach the WWAN aerial leads (1) from the contacts on the WWAN module. (printed page 64).
  7. Take the Phillips PM2.0×3.0 fastener (2) that holds the WWAN module to the main board. (The WWAN module tilts up.) (printed page 64).
  8. Take the WWAN module (3) out of its slot at an angle. (printed page 65).
  9. Fit the replacement part by working back through the printed removal steps (printed page 65).

Parts this procedure uses

Manufacturer manual

HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-elitebook-840-g2-wwan-module-replacement-p64

Key facts

HP document part number
781074-002
Model
HP EliteBook 840 G2
Release year
2015
Screen size
14"
Printed pages
58–65

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