HP Pavilion Dv7 4000 Entertainment Notebook Pc Series Manual

							4–2Maintenance and Service Guide
Removal and replacement procedures
Drive handling
Ä
CAUTION: Drives are fragile components that must be handled with care. To prevent damage to the computer, damage to a 
drive, or loss of information, observe these precautions:
■Before removing or inserting a hard drive, shut down 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. 
■Before handling a drive, be sure that you are discharged of static electricity. While handling a drive, avoid touching the 
connector.
■Before removing a diskette drive or optical drive, be sure that a diskette or disc is not in the drive and be sure that the optical 
drive tray is closed.
■Handle drives on surfaces covered with at least one inch of shock-proof foam. 
■Avoid dropping drives from any height onto any surface.
■After removing a hard drive, an optical drive, or a diskette drive, place it in a static-proof bag.
■Avoid exposing a hard drive to products that have magnetic fields, such as monitors or speakers. 
■Avoid exposing a drive to temperature extremes or liquids. 
■If a drive must be mailed, place the drive in a bubble pack mailer or other suitable form of protective packaging and label 
the package “FRAGILE.”
Grounding guidelines
Electrostatic discharge damage
Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the 
degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases, 
ESD contains enough power to alter device parameters or melt silicon junctions. 
A discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or 
microcircuitry. Even if the spark is neither felt nor heard, damage may have occurred. 
An electronic device exposed to ESD may not be affected at all and may work perfectly throughout a normal cycle. 
Or the device may function normally for a while, and then degrade in the internal layers, reducing its life 
expectancy. 
Ä
CAUTION: To prevent damage to the computer when you are removing or installing internal components, observe these 
precautions:
■Keep components in their electrostatic-safe containers until you are ready to install them.
■Use nonmagnetic tools. 
■Before touching an electronic component, discharge static electricity by using the guidelines described in this section.
■Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.
■If you remove a component, place it in an electrostatic-safe container. 
						

							Removal and replacement procedures
Maintenance and Service Guide4–3
The following table shows how humidity affects the electrostatic voltage levels generated by different activities.
ÄCAUTION: A product can be degraded by as little as 700 V. 
Packaging and transporting guidelines 
Follow these grounding guidelines when packaging and transporting equipment: 
■To avoid hand contact, transport products in static-safe tubes, bags, or boxes. 
■Protect ESD-sensitive parts and assemblies with conductive or approved containers or packaging. 
■Keep ESD-sensitive parts in their containers until the parts arrive at static-free workstations. 
■Place items on a grounded surface before removing items from their containers. 
■Always be properly grounded when touching a component or assembly. 
■Store reusable ESD-sensitive parts from assemblies in protective packaging or nonconductive foam. 
■Use transporters and conveyors made of antistatic belts and roller bushings. Be sure that mechanized 
equipment used for moving materials is wired to ground and that proper materials are selected to avoid static 
charging. When grounding is not possible, use an ionizer to dissipate electric charges. 
Workstation guidelines 
Follow these grounding workstation guidelines: 
■Cover the workstation with approved static-shielding material. 
■Use a wrist strap connected to a properly grounded work surface and use properly grounded tools and 
equipment. 
■Use conductive field service tools, such as cutters, screwdrivers, and vacuums. 
■When fixtures must directly contact dissipative surfaces, use fixtures made only of static-safe materials. 
■Keep the work area free of nonconductive materials, such as ordinary plastic assembly aids and Styrofoam. 
■Handle ESD-sensitive components, parts, and assemblies by the case or PCM laminate. Handle these items 
only at static-free workstations. 
■Avoid contact with pins, leads, or circuitry. 
■Turn off power and input signals before inserting or removing connectors or test equipment. 
Typical electrostatic voltage levels 
Relative humidity 
Event 10% 40% 55% 
Walking across carpet  35,000 V  15,000 V  7,500 V 
Walking across vinyl floor  12,000 V  5,000 V  3,000 V 
Motions of bench worker  6,000 V  800 V  400 V 
Removing DIPS from plastic tube  2,000 V  700 V  400 V 
Removing DIPS from vinyl tray  11,500 V  4,000 V  2,000 V 
Removing DIPS from Styrofoam  14,500 V  5,000 V  3,500 V 
Removing bubble pack from PCB  26,500 V  20,000 V  7,000 V 
Packing PCBs in foam-lined box  21,000 V  11,000 V  5,000 V  
						

							4–4Maintenance and Service Guide
Removal and replacement procedures
Equipment guidelines 
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 strips must be worn in contact with the skin. 
The following grounding equipment is recommended to prevent electrostatic damage: 
■Antistatic tape 
■Antistatic smocks, aprons, and sleeve protectors 
■Conductive bins and other assembly or soldering aids 
■Nonconductive foam 
■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 
■Material-handling packages 
■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 plastic  Bags  1,500 V 
Carbon-loaded plastic  Floor mats  7,500 V 
Metallized laminate  Floor mats  5,000 V  
						

							Removal and replacement procedures
Maintenance and Service Guide4–5
Component replacement procedures 
This chapter provides removal and replacement procedures. 
There are as many as 73 screws including captive screws, in 9 different sizes, that must be removed, replaced, or 
loosened when servicing the computer. Make special note of each screw size and location during removal and 
replacement. 
Service tag 
When ordering parts or requesting information, provide the computer serial number and model description 
provided on the service tag. 
Component Description
1 Product name This is the product name affixed to the front of your computer.
2 Serial number (s/n) This is an alphanumeric identifier that is unique to each product.
3 Part number/ product number (p/n) This number provides specific information about the product’s hardware 
components. The part number helps a service technician to determine what 
components and parts are needed.
4 Model description This is the alphanumeric identifier used to locate documents, drivers, and 
support for your computer.
5 Warranty period This number describes the duration of the warranty period for this computer. 
						

							4–6Maintenance and Service Guide
Removal and replacement procedures
Computer feet
The computer feet are adhesive-backed rubber pads. The feet are included in the Rubber Feet Kit, spare part 
number 516499-001. There are 4 rubber feet that attach to the base enclosure in the locations illustrated below.
Battery
Before disassembling the computer, follow these steps: 
1. Shut down 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 all external devices connected to the computer. 
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then 
unplugging the AC adapter from the computer. 
Remove the battery:
1. Turn the computer upside down on a flat surface. 
2. Slide the battery release latch 1 to release the battery. 
3. Pivot the battery 2 upward and remove it 3 from the computer. 
Description Spare part number 
12-cell, 95-Wh, 8.8 Ah Li-ion battery 570228-001
6-cell, 55-Wh, 2.55-Ah Li-ion battery  511872-001 
6-cell, 47-Wh, 2.2-Ah Li-ion battery 484170-001
3-cell, 47-Wh, 4.4-Ah Li-ion battery 516915-001 
						

							Removal and replacement procedures
Maintenance and Service Guide4–7
To install the battery, insert the rear edge of the battery into the battery bay and pivot the front edge of the battery 
downward until it is seated. The battery release latch automatically locks the battery into place. 
Webcam/microphone module
✎This section applies only to computer models equipped with BrightView display assemblies.
If it has been determined that the webcam/microphone module is the component that must be replaced to 
complete the computer repair, the display assembly does not have to be removed. Follow the procedures in this 
section to replace the webcam/microphone module. For information on replacing the display assembly and other 
display assembly internal components, see “Display assembly” on page 4-24.
Before removing the webcam/microphone module, follow these steps:
1. Shut down 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 all external devices connected to the computer. 
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then 
unplugging the AC adapter from the computer. 
4. Remove the battery (see “Battery” on page 4-6). 
Remove the webcam/microphone module:
1. Turn the computer display-side up, with the front toward you.
2. Open the computer as far as possible.
3. Flex the inside edges of the top edge 1 and the upper left and upper right corners 2 of the display bezel until 
the bezel disengages from the display enclosure.
Description Spare part number 
Webcam/microphone module with cable 571742-001 
						

							4–8Maintenance and Service Guide
Removal and replacement procedures
4. Release the display bezel top edge 3 from the display enclosure.
5. Release the webcam/microphone module 1 from the display enclosure as far as the webcam/microphone 
module cable allows.
6. Disconnect the webcam/microphone module cable 2 from the webcam/microphone module.
7. Remove the webcam/microphone module.
Reverse this procedure to install the webcam/microphone module. 
						

							Removal and replacement procedures
Maintenance and Service Guide4–9
Optical drive 
✎The optical drive spare part kit includes an optical drive bezel and bracket.
Before removing the optical drive, follow these steps: 
1. Shut down 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 all external devices connected to the computer. 
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then 
unplugging the AC adapter from the computer. 
4. Remove the battery (see “Battery” on page 4-6). 
Remove the optical drive: 
1. Position the computer with the front toward you. 
2. Remove the Phillips PM2.5×6.5 screw 1 that secures the optical drive to the computer.
3. Insert a thin tool, such as a paper clip, into the disc tray release access hole 2. (The optical drive disc tray is 
partially ejected from the optical drive.)
4. Use the disc tray frame to slide the optical drive 3 out of the computer.
5. Remove the optical drive.
6. If it is necessary to replace the optical drive bracket, follow these steps:
a. Position the optical drive with the optical drive bracket toward you. 
b. Remove the two Phillips PM2.0×3.0 screws that secure the optical drive bracket to the optical drive. 
c. Remove the optical drive bracket. 
Description Spare part number 
DVD±RW and CD-RW SuperMulti Double-Layer Combo Drive with LightScribe 511880-001
Blu-ray ROM with LightScribe DVD±R/RW SuperMulti Double-Layer Drive 511882-001 
						

							4–10Maintenance and Service Guide
Removal and replacement procedures
Reverse this procedure to reassemble and install the optical drive. 
Memory module
Before removing the memory module, follow these steps: 
1. Shut down 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 all external devices connected to the computer. 
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then 
unplugging the AC adapter from the computer. 
4. Remove the battery (see “Battery” on page 4-6). 
Remove the memory module:
1. Position the computer with the front toward you.
2. Remove the single screw that secures the optical drive to the computer (see “Optical drive” on page 4-9).
3. Loosen the three Phillips PM2.5×14.0 captive screws 1 that secure the memory module compartment cover to 
the computer.
4. Lift the rear edge 2 of the cover, swing it up and to the front, and remove the cover 3. The memory module 
compartment cover is included in the Plastics Kit, spare part number 579162-001.
Description Spare part number 
4096-MB, 1066 MHz DDR-3 DIMM 579156-001
2048-MB, 1066 MHz DDR-3 DIMM 579155-001
1024-MB, 1066 MHz DDR-3 DIMM  579154-001 
						

							Removal and replacement procedures
Maintenance and Service Guide4–11
5. Spread the retaining tabs 1 on each side of the memory module to release the memory module. (The edge of 
the module opposite the slot rises away from the computer.) 
✎If necessary, use a non-conductive pointed tool to spread the retaining tabs.
6. Remove the memory module 2 by pulling the module away from the slot at an angle. 
✎Memory modules are designed with a notch 3 to prevent incorrect insertion into the memory module slot.
Reverse this procedure to install a memory module.