User manual HP COMPAQ PRESARIO 2521EA SERVICE MANUAL

[. . . ] HP Pavilion ze5300 Notebook PC HP Pavilion ze5200 Notebook PC HP Pavilion ze4300 Notebook PC HP Pavilion ze4200 Notebook PC HP Pavilion ze4100 Notebook PC HP nx9010 Notebook PC HP nx9005 Notebook PC HP nx9000 Notebook PC Compaq Evo Notebook N1050v Series Compaq Evo Notebook N1010v Series Compaq Presario 2500 Series Mobile PC Compaq Presario 2100 Series Mobile PC Compaq Presario 1100 Series Mobile PC Technology Code KE Service Manual © 2003 Hewlett-Packard Development Company, L. P. Microsoft and Windows are trademarks of Microsoft Corporation in the U. S. Intel, Celeron, and Pentium are trademarks of Intel Corporation in the U. S. HP shall not be liable for technical or editorial errors or omissions contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. The information in this document is provided "as is" without warranty of any kind, and is subject to change without notice. [. . . ] Damage to cables or connectors can degrade performance. 3. 8. Wireless models only: Remove the mini-PCI door and unplug the two antenna cables from the mini-PCI card. Do not remove the mini-PCI card at this time. Remove the four M2. 5×4. 0 mm screws that attach the motherboard to the bottom case. From the back of the notebook, remove the six standoffs (two each from the external monitor port, serial port, and parallel port). Remove the antenna cable from the metal holder on the motherboard. Carefully lift the motherboard out of the bottom case. If present, remove the modem port cover. Figure 2-31. Removing the Motherboard HP Pavilion 4300, 4200, and 4100, HP nx9005 and nx9000, Compaq Evo Notebook N1050 and 1010, and Compaq Presario 2100 and 1100 Models Service Manual Removal and Replacement 2-51 Note This section applies only to HP Pavilion 5300 and 5200, HP nx9010, and Compaq Presario 2500 models. Required Equipment · #1 Phillips screwdriver. Removal Procedure Note: Before Replacing the Motherboard If possible, record the computer's electronic serial number before you replace the motherboard. You will then store the electronic serial number in the EEPROM on the new motherboard using the Service Utility floppy disk. Download the notebook service package from the Partnership Web site (see page vii), and create a Service Utilities floppy disk as described in the package's Readme file. Insert the Service Utilities floppy disk in the floppy drive. When the HP logo appears (on either the built-in display or the external monitor), press Esc to display the boot menu, then choose Removable Device and boot from the floppy disk. Select the Serial Number option from the boot menu. When prompted, type A for the automatic update option. This stores the current system data from the old motherboard on the floppy disk. 1. 2. Unplug the AC adapter, if present, and remove the battery. Remove these additional assemblies: · · · · · · · · Hard disk drive (page 2-9). Floppy drive (page 2-22). 2-52 Removal and Replacement Service Manual Caution: Wireless Models Be careful when removing and attaching antenna cables. Damage to cables or connectors can degrade performance. 3. 5. Wireless models only: Remove the mini-PCI door and unplug the two antenna cables from the mini-PCI card. [. . . ] Most, if not all, TFT displays exhibit some level of cosmetic imperfection. These cosmetic imperfections might be visible to the customer under varying display conditions, and can appear as bright, dim, or dark spots. This issue is common across all vendors supplying TFT displays in their products and is not specific to the notebook display. Notebook TFT displays meet or exceed all HP standards for cosmetic quality of TFT displays. [. . . ]