HP Pavilion Tx2500 Entertainment Notebook Pc Series Service Guide

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.
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 cord.
4.Remove the battery (see 
Battery on...

Component replacement procedures
This chapter provides removal and replacement procedures.
There are as many as 47 screws, in 8 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 location
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 following information:...

Computer feet
DescriptionSpare part number
Rubber Feet Kit (includes 4 base enclosure rubber feet and pen cover) 464821-001
The computer feet are adhesive-backed rubber pads. There are four computer feet (1) that adhere to
the computer base enclosure, and two computer feet (2) that adhere to the high-capacity battery.
38 Chapter 4   Removal and replacement procedures 

Battery
DescriptionSpare part number
8-cell, 73-Wh, 2.55-Ah battery 463650-003
6-cell, 55-Wh, 2.55-Ah battery 441132-003
6-cell, 2.55-Ah battery for use in Japan 534133-291
4-cell, 37-Wh, 2.55-Ah battery 441131-003
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...

Pen
DescriptionSpare part number
Pen593028-001
Before removing the pen, 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 cord.
4.Remove the battery (see 
Battery on page 39).
Remove the pen:
1.Position the computer with the left side toward you.
2.Press in on the pen (1) to release it...

Hard drive
DescriptionSpare part number
500-GB, 7200-rpm634924-001
320-GB, 7200-rpm603783-001
320-GB, 5400-rpm622643-001
160-GB, 7200-rpm579045-001
Hard Drive Hardware Kit (includes hard drive bracket, hard drive connector, and hard drive
screws)497744-001
Before removing the hard 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...

6.Remove the hard drive (2) from the hard drive bay.
7.If it is necessary to remove the hard drive bracket and connector, remove the four Phillips
PM3.0×3.0 hard drive bracket screws (1) from each side of the hard drive.
8.Lift the bracket (2) straight up to remove it from the hard drive.
9.Remove the connector (3) from of the hard drive.
Reverse this procedure to reassemble and install the hard drive.
42 Chapter 4   Removal and replacement procedures