HP 6730b 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...

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...

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....

Unknown user password
If the computer you are servicing has an unknown user password, follow these steps to clear the
password:
NOTE:These steps also clear CMOS.
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...

Component replacement procedures
This chapter provides removal and replacement procedures.
There are as many as 96 screws and screw locks, in 16 different sizes, that must be removed, replaced,
or loosened when servicing the computer. Make special note of each screw and screw lock size and
location during removal and replacement.
Service tag
The service tag, affixed to the bottom of the computer, provides information that may be needed when
troubleshooting system problems. The service tag provides the...

Computer feet
The computer feet are adhesive-backed rubber pads. The feet are included in the Rubber Kit, spare
part number 487145-001. There are 8 rubber feet that attach to the base enclosure in the locations
illustrated below.
46 Chapter 4   Removal and replacement procedures 

Battery
DescriptionSpare part number
6-cell, 55-Wh battery486296-001
6-cell, 47-Wh battery486295-001
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...

SIM
NOTE:This section applies only to computer models with WWAN capability. If there is a SIM inserted
in the SIM slot, it should be removed before disassembling the computer. Be sure the SIM is reinserted
in the SIM slot after reassembling the computer.
Before removing the SIM, 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...

Display inverter
DescriptionSpare part number
For use only with HP Compaq 6735b computer models495086-001
For use only with HP Compaq 6730b computer models 486773-001
Before removing the display inverter, 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...

6.Release the bottom edge of the display bezel (3) from the display assembly.
7.Release the inverter (1) from the display enclosure as far as the display panel cable and backlight
cable allow.
8.Disconnect the display panel cable (2) and the backlight cable (3) from the display inverter.
9.Remove the display inverter.
Reverse this procedure to install the display inverter.
50 Chapter 4   Removal and replacement procedures