HP Stream 8 Service Manual

							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 can work perfectly throughout a 
normal cycle. Or the device may function normally for a while, then degrade in the internal layers, reducing 
its life expectancy.
CAUTION:To prevent damage to the tablet 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.
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.
The following table shows how humidity affects the electrostatic voltage levels generated by 
different activities.
CAUTION:A product can be degraded by as little as 700 V.Typical electrostatic voltage levels Relative humidityEvent10%40%55%Walking across carpet35,000 V15,000 V7,500 VWalking across vinyl floor12,000 V5,000 V3,000 VMotions of bench worker6,000 V800 V400 VRemoving DIPS from plastic tube2,000 V700 V400 VRemoving DIPS from vinyl tray11,500 V4,000 V2,000 VRemoving DIPS from Styrofoam14,500 V5,000 V3,500 VRemoving bubble pack from PCB26,500 V20,000 V7,000 VPacking PCBs in foam-lined box21,000 V11,000 V5,000 VGrounding guidelines15   
						

							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, screw drivers, 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.
16Chapter 4   Removal and replacement preliminary requirements 
						

							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 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.
MaterialUseVoltage protection levelAntistatic plasticsBags1,500 VCarbon-loaded plasticFloor mats7,500 VMetallized laminateFloor mats5,000 VGrounding guidelines17 
						

							5Removal and replacement procedures
This chapter provides removal and replacement procedures for authorized service provider only parts.
CAUTION:Tablet components described in this chapter should only be accessed by an authorized service 
provider. Accessing these parts can damage the tablet and void the warranty.NOTE:HP continually improves and changes product parts. For complete and current information on 
supported parts for your tablet, go to 
http://partsurfer.hp.com, select your country or region, and then 
follow the on-screen instructions.
Tablet component replacement procedures
There are as many as 13 screws that must be removed, replaced, and/or loosened when servicing the tablet. 
Make special note of each screw size and location during removal and replacement.
Back cover
DescriptionSpare part numberBack cover796809-001Display panel assembly, 8.0-in (1280×800), AG, IPS, LED, multi-touch, wide-viewing angle, 5-point 
capacitive, auto-rotate (selectable), tempered-glass, backlit, TouchScreen (includes bezel 
and TouchScreen cable)796811-001
Before disassembling the tablet, follow these steps:
1.Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and 
then shut it down through the operating system.
2.Disconnect the power from the tablet by unplugging the power cord from the tablet.
3.Disconnect all external devices from the tablet.
Remove the back cover:
CAUTION:Before turning the tablet upside down, make sure the work surface is clear of tools, screws, and 
any other foreign objects. Failure to follow this caution can result in damage to the display panel.
1.Place the tablet on a flat surface, display panel side down, with the power button toward you.
2.Use the finger notch (1) in the front left corner of the back cover to lift the front edge (2) of the back 
cover until it separates from the display panel assembly.
18Chapter 5   Removal and replacement procedures    
						

							3.Remove the back cover (3).
Reverse this procedure to install the back cover.
Back cover19 
						

							Middle frameDescriptionSpare part numberFor use on HP Stream 8 Tablet 59xx models796810-002For use on HP Stream 8 Tablet 58xx models796810-001
Before removing the middle frame, follow these steps:
1.Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and 
then shut it down through the operating system.
2.Disconnect the power from the tablet by unplugging the power cord from the tablet.
3.Disconnect all external devices from the tablet.
4.Remove the back cover (see Back cover on page 18).
Remove the middle frame:
1.Remove the ten Phillips PM1.3×4.5 screws (1) that secure the middle frame to the 
display panel assembly.
2.Remove the middle frame (2).
Reverse this procedure to install the middle frame.
20Chapter 5   Removal and replacement procedures 
						

							BatteryDescriptionSpare part numberBattery, 4000-mAh, USB-charging, (includes cable and double-sided adhesive)795066-001
Before removing the battery, follow these steps:
1.Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and 
then shut it down through the operating system.
2.Disconnect the power from the tablet by unplugging the power cord from the tablet.
3.Disconnect all external devices from the tablet.
4.Remove the back cover (see Back cover on page 18).
WARNING!To reduce potential safety issues, use only the battery provided with the tablet, a replacement 
battery provided by HP, or a compatible battery purchased from HP.CAUTION:Removing a battery that is the sole power source for the tablet can cause loss of information. To 
prevent loss of information, save your work or shut down the tablet through Windows before removing 
the battery.
Remove the battery:
1.Disconnect the battery cable (1) from the system board.
2.Use a case utility tool (2) or similar thin plastic tool to detach the battery (3) from the display panel 
assembly. (The battery is attached to the display panel assembly with double-sided adhesive.)
Battery21   
						

							3.Remove the battery (4).
Reverse this procedure to install the battery.
3G antenna board
NOTE:This section applies only to HP Stream 8 Tablet 59xx models.DescriptionSpare part number3G antenna board796813-001
Before removing the 3G antenna board, follow these steps:
1.Shut down the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and then shut it down through the operating system.
2.Disconnect all external devices connected to the tablet.
3.Disconnect the power from the tablet by first unplugging the power cord from the AC outlet and then 
unplugging the AC adapter from the tablet.
4.Remove the back cover (see Back cover on page 18).
5.Remove the middle frame (see Middle frame on page 20).
6.Disconnect the battery cable from the system board (see Battery on page 21).
Remove the 3G antenna board:
22Chapter 5   Removal and replacement procedures  
						

							1.Disconnect the 3G antenna cables (1) from the system board 3G terminals.
2.Release the 3G antenna cable from the retention clip (2) built into the display panel assembly.
3.Remove the Phillips PM1.3×2.4 screw (3) that secures the 3G antenna board to the 
display panel assembly.
4.Detach the 3G antenna board (4) from the display panel assembly. (The 3G antenna board is attached to 
the display panel assembly with double-sided adhesive.)
5.Remove the 3G antenna board and cables.
Reverse this procedure to install the 3G antenna board.
3G antenna board23 
						

							Rear-facing webcamDescriptionSpare part numberRear-facing webcam (5.0-MP, auto-focus)796815-001
Before removing the rear-facing webcam, follow these steps:
1.Shut down the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, 
and then shut it down through the operating system.
2.Disconnect all external devices connected to the tablet.
3.Disconnect the power from the tablet by first unplugging the power cord from the AC outlet and then 
unplugging the AC adapter from the tablet.
4.Remove the back cover (see Back cover on page 18).
5.Remove the middle frame (see Middle frame on page 20).
6.Disconnect the battery cable from the system board (see Battery on page 21).
Remove the rear-facing webcam:
1.Disconnect the rear-facing webcam cable (1) from the system board.
2.Detach the rear-facing webcam (2) from the display panel assembly. (The rear-facing webcam is 
attached to the display panel assembly with double-sided adhesive.)
24Chapter 5   Removal and replacement procedures