HP Omnibook 4100 4150 Service Manual

HP OmniBook 4100/4150 Product Information 1-15
 Table 1-13. Functional Structure
BootupCPU module
Motherboard
BIOS IC
Floppy disk module
Hard disk driveMain processor (MMO).
Primary system circuitry.
Code for basic system functions (part of motherboard on OB 4150).
First source of disk-based startup code.
Second source of disk-based startup code.
ProcessorCPU module
MotherboardMain processor, numeric data processor, L1 and L2 cache.
Primary system circuitry.
MemoryMotherboard
RAM board
VGA PCANo onboard...

HP OmniBook 4100/4150 Removal and Replacement 2-1
2 
Removal and Replacement
This chapter tells you how to remove and replace the following components and assemblies. The ones
marked by 
· are user-replaceable.
 Table 2-1. Removal Cross-Reference
 
 Air vent cover (table on page 2-33).
 Audio jack cover (table on page 2-33).
 Audio jack PCA (table on page 2-33).
 · Battery (page 2-3).
 BIOS IC (page 2-28).
 Bottom case (page 2-19).
 Cable holder (table on page 2-31).
 CPU bottom plate (table on page...

2-2 Removal and Replacement HP OmniBook 4100/4150
  Notes
 
Reassembly steps are the reverse of the removal steps. Reassembly notes are included at the
end of each section below.
 
Symbols like this throughout this chapter show approximate full-size screw outlines. You
can use them to verify the sizes of screws before you install them. Installing a wrong-size screw
can damage the unit. (The symbol at the left represents an M2.5×5mm T-head screw.)
 Table 2-2. Required Equipment
 · Small Phillips...

HP OmniBook 4100/4150 Removal and Replacement 2-3
Removing the Battery or Plug-In Module
(User-Replaceable)
Required Equipment
 · None.
Removal Procedure
 1. Unplug the ac adapter, if present.
 2. Slide forward the module latch slider on the corner next to the module, then swing back the latch
to loosen the module.
 3. Pull out the module.
 4. Slide the latch back into the case.
 
 Figure 2-1. Removing the Battery or Plug-In Module
Reassembly Notes
 · Important: You must slide the latch forward before...

2-4 Removal and Replacement HP OmniBook 4100/4150
Removing a RAM Board
(User-Replaceable)
The OmniBook 4100 has 32 MB of RAM on the motherboard and has one RAM slot for installing
additional RAM. The OmniBook 4150 Series has no RAM on the motherboard and has two RAM
slots for installing RAM.
 Table 2-4. RAM Board Replacement Part Numbers
DescriptionPart NumberExchangeOmniBook
Part Number4150B4150†4100
RAM board, 32-MB SDRAM (66 MHz) 1818-7413 F1456-69001
··
RAM board, 64-MB SDRAM (66 MHz) 1818-7414...

HP OmniBook 4100/4150 Removal and Replacement 2-5
Reassembly Notes
 · Insert the RAM board into the connector at about a 30° angle until it is fully inserted. Then press
down at both sides until both latches snap closed.
Removing the Hard Disk Drive
(User-Replaceable)
 Table 2-5. Hard Disk Drive Replacement Part Numbers
DescriptionPart NumberExchangeOmniBook
Part Number4150B4150†4100
Drive, hard disk (4.0GB, 12.7mm, IBM) 0950-2671 F1386-69100
·
Drive, hard disk (4.0GB, 12.7mm, Toshiba) 0950-2865...

2-6 Removal and Replacement HP OmniBook 4100/4150
 5. If you are installing a new hard drive that does not have a cover, you can remove the cover parts
from the old hard drive:
 · Remove the screw from the case, then pry open the flap. If necessary, use a flat-blade
screwdriver
 · Use a flat-blade screwdriver to pry open the snaps at the ends of the case, then open the
connector-side of the case.
 · Pry out the corner next to the connector, then lift out the connector and hard drive together.
 · Unplug...

HP OmniBook 4100/4150 Removal and Replacement 2-7
  Important
 ·  If you are installing a new hard drive, create a Hibernate partition on the drive before loading
any software—see the steps below.
Creating a Hibernate Partition – OmniBook 4100
 1. If you do not have an OmniBook Recovery CD and internal CD-ROM (or DVD) module for the
computer you are repairing, create a Support Utility floppy disk now.
 After inserting a formatted floppy disk in the floppy drive, do one of the following:
  On an OmniBook...

2-8 Removal and Replacement HP OmniBook 4100/4150
Replacing Small Parts
(User-Replaceable)
The following small parts are user-replaceable.
 Table 2-6. Replacing Small Parts (User-Replaceable)
PartReplacement Procedure
Docking DoorsOpen each door and flex the door until one side tab releases. To replace, see the
picture on page 2-28.
FeetInsert a small flat-blade screwdriver under the foot and pry it loose. To replace, firmly
press the adhesive side of the foot into the recess.
Hinge Cover, LeftW ith the...