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Remove and Replace the Real Time Clock Battery for HP Pavilion 15-abXXX Notebook PCs

This document applies to HP Pavilion 15-abXXX notebook computers.
HP Pavilion 15-ab000 notebook computer

Before you begin

  • Have available a flat bladed, non-metallic prying tool and a Phillips-head screwdriver.
  • Turn off the computer. Disconnect the Ethernet or modem cable. Disconnect the power cord.
  • HP strongly recommends the use of an anti-static wrist strap and a conductive foam pad when working on the computer.
  • Transfer the computer to a clear, flat, stable work surface over a non-carpeted floor.
  • Do not remove a component from its protective packaging until you are ready to install it.
  warning:
Make sure the computer is disconnected from power before starting. Before starting, power off the computer and wait for components to cool before starting these procedures.
  caution:
This product contains components that can be damaged by electrostatic discharge (ESD). To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (such as a conductive foam pad), and wear an ESD wrist strap connected to a grounded surface.
  caution:
Procedures in this document are provided by HP for qualified service agents and as a courtesy to its customers. Servicing internal components increases the risk of damaging the computer which might not be covered under warranty. Understand the risk and refer to the product's warranty before attempting to service the computer.

Video overview

View the following video before using the steps in this article.
note:
The video and graphics in this article depict a specific configuration of notebook computer. These same removal and replacement procedures apply to all configurations of HP Pavilion 15-abXXX notebook computers.

Removing the real time clock battery

To remove the real time clock battery (CMOS battery or RTC battery), first follow the instructions to remove the computer battery, the optical drive, and the rear corner covers, then follow the steps to remove the base enclosure.
Step 1
Find the battery lock latch identified by the lock icon on the bottom of the computer and slide it to the unlock position.
Sliding the battery lock latch
Step 2
Find the battery release latch identified by the battery icon and slide the battery release latch to the release position to partially eject the battery.
Sliding the battery release latch to release the battery
Step 3
Lift the front edge of the battery and remove the battery from the battery bay.
Lifting and removing the battery
Step 4
Now remove the optical drive.
Remove the 6.5 mm P1 Phillips-head screw that secures the optical drive to the base enclosure.
Screw that secures the optical drive
Step 5
Grasp the optical drive bezel and carefully slide the optical drive out of the base enclosure.
Removing the optical drive
Step 6
Remove the rear corner covers
Remove the two 12 mm P1 Phillips-head screws that secure the corner covers to the base enclosure.
The screw locations that secure the corner covers
Step 7
Carefully lift the corner covers to disengage the tabs that secure them to the base enclosure and remove.
Removing the left cover
Removing the right cover
Step 8
Now, remove the base enclosure.
With a pair or tweezers, remove the two Mylar screw covers from the base enclosure.
Mylar covers to remove
Step 9
Remove the thirteen 6.5 mm P1 Phillips-head screws that secure the base enclosure to the top cover.
Screw locations of the thirteen screws to remove
Step 10
Remove the two 5 mm P1 Phillips-head screws that secure the base enclosure to the top cover.
Two screw locations
Step 11
Carefully separate the edges of the base enclosure from the top cover...
  caution:
To prevent damage to the base enclosure, take extreme care when separating the area around the optical drive bay from the top cover.
Separating the edges of the base enclosure from the top cover
... and slide it off the display panel hinges.
Lifting  the base enclosure off the display panel hinges
Step 12
Now, to remove the RTC battery, Use a non-metallic flat-bladed tool to pry up the battery to release and remove it from its socket.
Prying up the RTC battery

Replacing the real time clock battery

Use the steps in this section to replace the real time clock battery and other removed components.
Step 1
With the positive side of the RTC battery facing up, insert the edge of the RTC battery into its socket...
Inserting the RTC battery into its socket
... and gently press down until it snaps into place.
Pressing and snapping the battery into place
Step 2
Slide the base enclosure onto the display panel hinges.
  caution:
Ensure that the wireless antenna and display panel cables are free from being pinched between the base enclosure and top cover.
Sliding the base enclosure onto the hinges
Step 3
Place the base enclosure into position on the top cover. Apply pressure to the edges of the base enclosure to snap it into place.
Applying pressure to snap the base enclosure into place
Step 4
Replace the two 5 mm P1 Phillips-head screws that secure the base enclosure to the top cover.
Two screw locations
Step 5
Replace the thirteen 6.5 mm P1 Phillips-head screws that secure the base enclosure to the top cover.
Thirteen screw locations
Step 6
Place the two Mylar screw covers into position on the base enclosure.
Mylar screw cover locations
Step 7
Align the corner covers with the base enclosure and press down on the corner covers to secure them into position.
Replacing the right corner cover
Replacing the left corner cover
Step 8
Replace the two 12 mm P1 Phillips-head screws that secure the corner covers to the base enclosure.
Screw locations to secure the corner covers
Step 9
Insert the optical drive into the optical drive bay...
Inserting the optical drive
...until the optical drive bezel is flush with the side of the base enclosure.
Optical drive is flush with the side of the computer
Step 10
Replace the 6.5 mm P1 Phillips-head screw that secures the optical drive to the base enclosure.
Screw that secures the optical drive
Step 11
Insert the rear edge of the battery into the battery bay and lower the battery until it is properly seated and the battery release latch clicks.
Replacing the battery into its bay
Step 12
Slide the battery lock to the lock position to secure the battery.
Sliding the battery latch lock into the lock position

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