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Grounding equipment must include either a wrist strap or a foot strap at a grounded workstation.
When seated, wear a wrist strap connected to a grounded system. Wrist straps are flexible straps with a
minimum of one megohm ±10% resistance in the ground cords. To provide proper ground, wear a strap
snugly against the skin at all times. On grounded mats with banana-plug connectors, use alligator clips
to connect a wrist strap.
When standing, use foot straps and a grounded floor mat. Foot straps (heel, toe, or boot straps) can be
used at standing workstations and are compatible with most types of shoes or boots. On conductive
floors or dissipative floor mats, use foot straps on both feet with a minimum of one megohm resistance
between the operator and ground. To be effective, the conductive must be worn in contact with the
The following grounding equipment is recommended to prevent electrostatic damage:
Antistatic smocks, aprons, and sleeve protectors
Conductive bins and other assembly or soldering aids
Conductive tabletop workstations with ground cords of one megohm resistance
Static-dissipative tables or floor mats with hard ties to the ground
Field service kits
Static awareness labels
Nonconductive plastic bags, tubes, or boxes
Metal tote boxes
Electrostatic voltage levels and protective materials
The following table lists the shielding protection provided by antistatic bags and floor mats.
Material Use Voltage protection level
Antistatic plastics Bags 1,500 V
Carbon-loaded plastic Floor mats 7,500 V
Metallized laminate Floor mats 5,000 V
Grounding guidelines 23
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5 Removal and replacement procedures for
Authorized Service Provider parts
CAUTION:Components described in this chapter should only be accessed by an authorized service provider.
Accessing these parts can damage the computer or void the warranty.
NOTE:HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to
http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
Component replacement procedures
This chapter provides removal and replacement procedures for Authorized Service Provider only parts.
There are as many as 57 screws that must be removed, replaced, and/or loosened when servicing the
computer. Make special note of each screw size and location during removal and replacement.
24 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts
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DescriptionSpare part number
For use in red models809671-001
For use in silver models809670-001
For use in green models809672-001
For use in purple models816504-001
Top cover with keyboard and TouchPad:
For use in Belgium809543-A41
For use in Brazil809543-201
For use in Bulgaria809543-261
For use in Canada (English/French) 809543-DB1
For use in the Czech Republic and Slovakia 809543-FL1
For use in France809543-051
For use in Germany809543-041
For use in Greece809543-151
For use in Hungary809543-211
For use internationally809543-B31
For use in Israel809543-BB1
For use in Italy809543-061
For use in Japan809543-291
For use in Latin America809543-161
For use in the Netherlands809543-DH1
For use in Portugal809543-131
For use in Romania809543-271
For use in Russia809543-251
For use in Saudi Arabia809543-171
For use in South Korea809543-AD1
For use in Spain809543-071
For use in Switzerland809543-BG1
For use in Taiwan809543-AB1
For use in Thailand809543-281
For use in Turkey809543-141
For use in the United Kingdom 809543-031
For use in the United States809543-001
Component replacement procedures 25
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Before removing the top cover, follow these steps:
1.Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2.Disconnect the power from the computer by unplugging the power cord from the computer.
3.Disconnect all external devices from the computer.
Remove the top cover:
1.Position the computer upside-down.
2.Pry the two rear rubber feet off the bottom cover (1).
3.Pry the screw cover off the bottom cover (2).
Rubber feet and rubber screw cover are available in the Rubber Kit, spare part numbers:
Silver models: 809550-001
Red models: 809551-001
Green models: 809552-001
Purple models: 816522-001
4.Remove the nine Phillips PM2.5×6.0 screws (3) that secure the top cover to the computer.
5.Position the computer upright, and then open the computer as far as possible.
26 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts
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6.Run a plastic, non-marking tool around the seam to disengage the top cover from the computer.
Separate the top cover from the computer by separating and lifting up at the seam on the left side (1),
top (2), and right side (3), far enough to access the keyboard and touchpad connectors on the system
NOTE:You can use a plastic, non-marking tool inserted in the seam to disengage the top cover.
NOTE:When you lift the top cover, the keyboard cable and the touchpad cable are connected to the
system board. Be sure not to pull the cables loose when lifting the bottom cover.
7.Disconnect the touchpad cable (1) and the keyboard cable (2) from the system board, and then remove
the top cover from the computer (3).
Reverse this procedure to install the top cover.
Component replacement procedures 27