HP Pavilion Zt1000 Xz300 Service Manual

							Technology Code ID)  Removal and Replacement  2-29 
  
 
 
Figure 2-21. Removing the Top Case 
Reassembly Notes 
• Make sure the touch pad cable, and CD/DVD player PCA cable, and volume PCA cable (if 
present) are securely connected. 
• If present, reinsert the wireless cables into their slot in the top case. 
• Make sure the tabs along the edges of the case snap shut. 
Screws,  
M2×4mm (2) 
Screws, 
M2.5x6mm  (2) Screws, 
M2×4mm (3) 
Screws, 
M2×4mm (3) 
Screws, 
M2×4mm (5)  
						

							2-30  Removal and Replacement  Technology Code ID) 
Removing the Hinge Saddles 
(HP Authorized Service Providers Only) 
Required Equipment 
• #0 Phillips screwdriver. 
Removal Procedure 
1.  Unplug the AC adapter, if present, and remove the battery. 
2.  Remove these additional assemblies: 
• Keyboard cover (page 2-9). 
• Keyboard (page 2-11). 
• Display assembly (page 2-18). 
• Top case (page 2-27). 
3.  Remove the retaining screws from the right hinge saddle, and lift the hinge saddle out of the 
notebook. 
4.  Remove the retaining screws from the left hinge saddle, and lift the hinge saddle out of the 
notebook. 
 
Caution 
Be careful not to damage the volume control PCA (if present) after removing the right hinge saddle. 
If excessive handling of the bottom case is anticipated, it is recommended that you remove the 
PCA to avoid accidentally displacing it. 
 
  
						

							Technology Code ID)  Removal and Replacement  2-31 
  
 
 
Figure 2-22. Removing the Hinge Saddles 
Reassembly Notes 
• Make sure the posts on the underside of the hinge saddles line up with the openings in the bottom 
case, and that the holes in the front ends of the saddle fit over the alignment posts in the bottom 
case.  
Screw, M2×4mm 
Screws, 
M2.5x6mm (3) Screw, 
M2.5x6mm  
Screw, 
M2.5x8mm  
						

							2-32  Removal and Replacement  Technology Code ID) 
Removing the Motherboard or Bottom Case 
(HP Authorized Service Providers Only) 
Required Equipment 
• #0 Phillips screwdriver. 
• .5 mm hex driver 
When Installing a New Motherboard 
Before replacing the motherboard, you must (if possible) electronically store the motherboard’s serial 
number and service ID for transfer to the new motherboard. 
1.  Exit Windows and boot to a DOS prompt. 
2.  Run ESN.EXE from one of these sources: 
• On a factory software installation, change to the \hp\drivers\hputils directory and type esn at 
the prompt. 
• Otherwise, copy \hp\drivers\hputils\ESN.EXE from the Recovery CD, then run it on the 
notebook. 
3.  Store the serial number and service ID as directed. 
Removal Procedure 
1.  Unplug the AC adapter, if present, and remove the battery.  
2.  Remove these additional assemblies: 
• Battery (page 2-4). 
• Plug-in module (page 2-5). 
• Hard disk drive (page 2-6). 
• Keyboard cover (page 2-9). 
• Keyboard (page 2-11). 
• SDRAM modules (page 2-13). 
• Mini-PCI card (page 2-16). 
• Display assembly (page 2-18). 
• Fan and heatsink (page 2-22). 
• CPU module (page 2-25). 
• Top case (page 2-27). 
• Hinge saddles (page 2-30). 
3.  Remove the retaining screws from the hard disk drive guide, and lift the guide off of the 
motherboard. 
4.  Remove the retaining screw from each CD/DVD disk drive guide, and life the guides off of the 
motherboard.  
						

							Technology Code ID)  Removal and Replacement  2-33 
5.  Remove both retaining screws from the motherboard. 
6.  Remove the four standoffs located near the CPU module. 
7.  Disconnect the audio PCA and remove it from the motherboard. 
8.  Lift the front edge of the motherboard slightly, then carefully lift the motherboard forward and out 
of the bottom case. 
  
 
 
Figure 2-23. Removing the Motherboard 
Reassembly Procedure 
• When reinstalling the motherboard, see “Reinstalling the Motherboard” on page 2-34. 
• When reinstalling the bottom case, see “Replacing the Bottom Case” on page 2-35. 
Screws, M2×4mm (2) 
Screws, 
M2.5x6mm (3) 
Screws, 
M2.5x6mm (2) 
Screw, 
M2.5x6mm  
Screws,  
M2×4mm (2) 
Standoffs,  
5mm (4)  
						

							2-34  Removal and Replacement  Technology Code ID) 
Reinstalling the Motherboard 
Reassembly Procedure 
1.  Insert the I/O connectors through their openings in the bottom case, then lower the motherboard 
into place. 
2.  Make sure the PC card eject button fits into its slot in the bottom case. 
3.  Make sure the alignment posts in the bottom case—near the CPU module and PC card guide—fit 
through the corresponding openings in the motherboard. 
When Installing a New Motherboard 
After installing a new motherboard, you must electronically transfer to it the serial number and service 
ID from the previous motherboard. 
1.  Exit Windows and boot to a DOS prompt. 
2.  Run ESN.EXE from the same source you used when saving the serial number and service ID from 
the previous motherboard: 
• On a factory software installation, change to the \hp\drivers\hputils directory and type esn at 
the prompt. 
• Otherwise, copy \hp\drivers\hputils\ESN.EXE from the Recovery CD, then run it on the 
notebook. 
3.  Install the serial number and service ID. 
• If you are prompted for the serial number, type the serial number shown on the bottom of the 
case. 
• If a serial number has already been stored, you must call an HP support center to change it (see 
page vi).  
						

							Technology Code ID)  Removal and Replacement  2-35 
Replacing the Bottom Case 
Installation Procedure 
1.  Install a new Microsoft Product ID label. 
2.  Transfer the old serial number label and install a new overlay, or create a new serial number label 
using the steps on the following page. 
3.  If you need to install or replace the docking doors or PCMCIA doors, refer to the figures below. 
  
 
 
Figure 2-24. Installing the Docking Doors 
  
 
 
Figure 2-25. Installing the PCMCIA Doors  
						

							2-36  Removal and Replacement  Technology Code ID) 
Installing a New Serial Number Label 
Download the latest version of the serial number label template (Microsoft Word format) from the 
Partnership Web site (see page vi) under Support/Service in Technical Support Information, or from 
http://www.mcd.hp.com. Store it with other Word templates on a PC connected to a laser printer. The 
latest version includes fields for warranty period and manufacturing location. 
1.  Open a new document based on the serial label template. 
2.  Enter the information from the old serial label, and print the new label on plain white paper. The 
new label does not have barcodes. 
3.  Carefully cut out the new serial label just inside the border and place it into the inner recess in the 
bottom case. The bottom of the label goes toward the front of the case. 
4.  While holding the paper label in place, attach a serial label overlay into the outer recess. It covers 
and protects the serial label. 
 
HP Serial Number (S)TW711A1234  1YR 
(1P) F2072 W   EA   MFG# TW711A1234 
Made in Taiwan 
Figure 2-26. Example of Serial Number Label  
						

							Technology Code ID)  Removal and Replacement  2-37 
Removing Notebook Components 
(HP Authorized Service Providers Only) 
Required Equipment 
• #0 Phillips screwdriver. 
• Small flat-blade screwdriver. 
Removal Procedure 
1.  Unplug the AC adapter, if present, and remove the battery.  
2.  Remove the assemblies and follow the additional steps given in the table below. 
Table 2-5. Removing Notebook Components 
Component Removal Procedure Additional Steps 
Antenna, wireless See page 2-20. 
 
Bezel, display See page 2-20. 
 
Card, mini-PCI See page 2-16. 
 
Case, bottom See page 2-32. 
 
Case, top See page 2-27. 
 
Cover, keyboard See page 2-9.   
Display assembly See page 2-18.   
Doors, docking Plug-in module (page 2-5). 
Hard disk drive (page 2-6). 
Keyboard cover 
(page 2-9). 
Keyboard (page 2-11). 
SDRAM modules  
(page 2-13). 
Mini-PCI card (page 2-16). 
Display assembly 
(page 2-18). 
Fan and heatsink 
(page 2-22). 
CPU module (page 2-25). 
Top case (page 2-27). 
Hinge saddles 
(page 2-30). 
Motherboard (page 2-32). See Figure 2-24 on page 2-35.  
						

							2-38  Removal and Replacement  Technology Code ID) 
Component Removal Procedure Additional Steps 
Doors, PCMCIA Plug-in module (page 2-5). 
Hard disk drive (page 2-6). 
Keyboard cover 
(page 2-9). 
Keyboard (page 2-11). 
SDRAM modules  
(page 2-13). 
Mini-PCI card (page 2-16). 
Display assembly 
(page 2-18). 
Fan and heatsink 
(page 2-22). 
CPU module (page 2-25). 
Top case (page 2-27). 
Hinge saddles 
(page 2-30). 
Motherboard (page 2-32). See Figure 2-25 on page 2-35. 
Fan See page 2-22. 
 
Guide, hard disk drive Keyboard cover 
(page 2-9). 
Keyboard (page 2-11). 
Display assembly 
(page 2-18).  
Top case (page 2-27). Remove the retaining screws, and lift the guide off of 
the motherboard.  
Guides, optical disk 
drive Keyboard cover 
(page 2-9). 
Keyboard (page 2-11). 
Display assembly 
(page 2-18).  
Top case (page 2-27). Remove the retaining screw on each guide, and lift the 
guides off of the motherboard 
Heatsink See page 2-22. 
 
Keyboard See page 2-11. 
 
Module, CPU See page 2-25. 
 
PCA, Audio Keyboard cover 
(page 2-9). 
Keyboard (page 2-11). 
Display assembly 
(page 2-18).  
Top case (page 2-27). 
Hinge saddle, left 
(page 2-30). Carefully lift the PCA off of its connector, gently pull 
the audio jacks out of their openings in the bottom 
case, and lift the PCA out of the notebook. 
Reassembly Notes: Make sure that the audio jacks fit 
through their openings in the bottom case, and the 
PCA is set securely on its connector. 
PCA, inverter See page 2-20.   
PCA, Modem/Mini-PCI  See page 2-15 
 
PCA, motherboard See page 2-32.