HP EliteBook 840 G2 system board replacement

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

Part you need730959-001HP Power button board with cable 730959-001 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. Part numbers in our catalog
  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 100–103). 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 system board replacement. HP prints this procedure on printed page 100 of its maintenance and service guide.

tools and parts

  • Flat-bladed drivers, Magnetic drivers and Phillips P0 and P1 drivers
  • Static-safe work surface
  • No spare part number for this component was found in the cached manual
  • 799543-601 - System board. Source: printed page 97.

preparation

HP prints its tools list and its handling and electrostatic-discharge cautions on printed page 51. Work on a grounded, static-safe surface, keep screws grouped by the position they came from, and handle boards and modules by their edges.

replacement

  1. Position the computer right side up. (printed page 100).
  2. Open computer as far as it will open. (printed page 100).
  3. Let go of ZIF connector to which fingerprint reader cable is connected, and then disconnect fingerprint reader cable from the system board. (printed page 101).
  4. Close computer. 5. Turn computer upside down with the rear toward you. (printed page 101).
  5. Set the computer on its face with the rear toward you. (printed page 101).
  6. Let go of ZIF connector to which card reader cable is connected, and then disconnect card reader cable from the system board. (printed page 101).
  7. Let go of ZIF connector to which USB/VGA connector board cable is connected (printed page 101).
  8. Let go of ZIF connector to which power button board wire is connected, and then disconnect power button board cable from the system board. (printed page 101).
  9. Let go of the display panel cable off the routing channel attached to the system board. (printed page 101).
  10. Detach the display panel cable from the system board. (printed page 101).
  11. Detach the speaker cable from the system board. (printed page 101).
  12. Let go of the wireless antenna cables away off the routing clips and channels built into the upper cover. (printed page 102).
  13. Take out the three Phillips PM2.5×5.0 screws that hold the system board to the top cover. (printed page 102).
  14. Lift the left side of the system board until it rests at an angle. (printed page 102).
  15. Take out system board by sliding it up and to left at an angle. (printed page 103).
  16. Put the system board back by repeating the printed removal moves in the opposite order (printed page 103).

Part numbers in our catalog

Check each part page for its source and variant notes before ordering.

Manufacturer manual

HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-elitebook-840-g2-system-board-replacement-p100

Key facts

HP document part number
781074-002
Model
HP EliteBook 840 G2
Release year
2015
Screen size
14"
Printed pages
100–103

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