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 rtc battery replacement. HP prints this procedure on printed page 80 of its maintenance and service guide, and the spare-part table for this part is on printed page 80.
tools and parts
- Flat-bladed drivers, Magnetic drivers and Phillips P0 and P1 drivers
- Static-safe work surface
665733-001- RTC battery (includes cable and double-sided adhesive). Source: printed page 80.
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
- Detach the RTC battery cable from the system board. (printed page 80).
- Slide the battery out from the bottom cover, and then remove the battery (3). (printed page 80).
- Take out the RTC battery. (printed page 80).
- Put the rtc battery back by repeating the printed removal moves in the opposite order (printed page 80).
Part numbers in our catalog
- HP RTC battery (665733-001)
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-rtc-battery-replacement-p80