User manual HP EVO N160

[. . . ] b Maintenance and Service Guide Compaq Notebook Evo N160 Series Document Part Number: 260552-001 October 2001 This guide is a troubleshooting reference used for maintaining and servicing the notebook. It provides comprehensive information on identifying computer features, components, and spare parts, troubleshooting computer problems, and performing computer disassembly procedures. © 2001 Compaq Computer Corporation Compaq, Evo, and the Compaq logo are trademarks of Compaq Information Technologies Group, L. P. Microsoft and Windows are trademarks of Microsoft Corporation. Intel, Pentium, and Celeron are trademarks of Intel Corporation. [. . . ] Improper cable placement can damage the computer. 4­2 Maintenance and Service Guide Removal and Replacement Preliminaries 4. 3 Preventing Damage to Removable Drives Removable drives are fragile components that must be handled with care. To prevent damage to the computer, damage to a removable drive, or loss of information, observe the following precautions: I Before removing or inserting a hard drive, shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, then shut it down. Before removing a diskette drive or optical drive, ensure that a diskette or disc is not in the drive. Ensure that the optical drive tray is closed. Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid touching the connector. Handle drives on surfaces that have at least one inch of shock-proof foam. Avoid dropping drives from any height onto any surface. After removing a hard drive, CD-ROM drive, or a diskette drive, place it into a static-proof bag. Avoid exposing a hard drive to products that have magnetic fields, such as monitors or speakers. Avoid exposing a drive to temperature extremes or to liquids. If a drive must be mailed, place the drive into a bubble pack mailer or other suitable form of protective packaging and label the package "Fragile: Handle With Care. " I I I I I I I I Maintenance and Service Guide 4­3 Removal and Replacement Preliminaries 4. 4 Preventing Electrostatic Damage Many 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 the discharge contains enough power to alter device parameters or melt silicon junctions. A sudden discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge may not be affected at all and can work perfectly throughout a normal cycle. The device may function normally for awhile, then degrade in the internal layers, reducing its life expectancy. 4. 5 Packaging and Transporting Precautions Use the following grounding precautions when packaging and transporting equipment: I I I I I To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes. Protect all electrostatic-sensitive parts and assemblies with conductive or approved containers or packaging. Keep electrostatic-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. [. . . ] Certain restrictions and exclusions apply. Consult the Compaq Customer Support Center for details. Maintenance and Service Guide 6­5 Specifications Table 6-3 Hard Drives (Continued) 30. 0 GB Physical configuration Cylinders3 Heads Sectors per track3 Bytes per sector Buffer size3 Disk rotational speed (rpm) Transfer rate Interface max (MB/s)2 Media (Mb/s)3 11 2System 20. 0 GB 15. 0 GB 22, 784 6 293­560 512 2 MB 4200 22, 784 4 293­560 512 2 MB 4200 25, 800 2 398­731 512 512 KB 4200 66. 6 109­203 66. 6 109­203 100 155­256 GB = 1, 000, 000, 000 bytes. 3 Actual drive specifications may differ slightly. Certain restrictions and exclusions apply. [. . . ]