Computer Support and Maintenance Pdf notes KNEC

Description

INTRODUCTION TO COMPUTER SUPPORT AND MAINTENANCE
INTRODUCTION TO COMPUTER HARDWARE COMPONENTS
FUNCTIONS OF A PC
COMPONENTS OF A PC
Input Devices
Mouse
Processing
Storage devices
Output devices
Cleaning other computer surfaces
The System Unit Components
Power supply
CD-ROM
Input/Output Ports
TYPES OF COMPUTERS
COMPUTER SAFETY
PC TOOLKITS
ELECTRICAL SAFETY
FIRE SAFETY
MATERIAL STORAGE AND DISPOSAL
Batteries
Printer Toner cartridges and inks
Computer hardware
CLEANING AND SERVICING
ELECTRICAL TESTING
Common Test Meter features
Taking a Voltage Measurement
Taking a Resistance Measurement
Maintenance
Types of maintenance
Cleaning Tool and Hand Tools
Cleaning materials
Cleaning other computer surfaces
Safeguarding against malware
The display screen
DISPLAY ADAPTERS AND MONITORS
VIDEO MEMORY
Monitor specifications
TROUBLESHOOTING DISPLAY/MONITOR PROBLEMS
PORTABLE COMPUTERS & POWER MANAGEMENT
POWER MANAGEMENT TECHNIQUES
PRINTERS AND PRINTING
GENERAL PRINTER OPERATION
THE PRINTING PROCESS
TROUBLESHOOTING PRINTERS
TIPS FOR SHOPPING FOR A PRINTER
PORTS AND CABLING
CONNECTOR TYPES
DB Connectors
DIN connectors
Audio Connectors
PARALLEL PORT
IEEE1284
Data skew
SERIAL PORT
KEYBOARD PORT
MOUSE PORT
MONITOR PORTS
USB PORT (UNIVERSAL SERIAL BUS) AND HUBS
IEEE 1394 (The Institute of Electrical and Electronic Engineers)
SCSI PORTS
INFRARED PORTS
OTHER PORTS
THE MOTHERBOARD
MOTHERBOARD COMPONENTS
CPU- Central Processing Unit
Math Co-processor
BIOS- Basic Input Output System
CMOS- Complimentary Metal Oxide Semiconductor
Cache Memory
Expansion Buses
Chipset
CPU Clock
Switches and Jumpers
Main Memory (RAM)
MOTHERBOARD FORM FACTORS
LPX and Mini LPX
NLX
EXPANSION BUS TYPES
PROCESSORS
PROCESSOR TERMS
OTHER PROCESSORS
CPU PACKAGING
MOTHERBOARD CPU SOCKETS
PROCESSOR UPGRADES
TROUBLESHOOTING THE PROCESSOR
INTRODUCTION TO PC MEMORY
PC MEMORY BLOCKS
MEMORY PACKAGES
MEMORY DIAGNOSTICS
STORAGE MEDIA
REMOVABLE MAGNETIC STORAGE
FLOPPY DISK DRIVES
JAZ DRIVES
ZIP DRIVES
LS-20 SUPERDISK
COMPACT DISK DRIVES
WORM Drives
TAPE DRIVES
Removable Hard Disk drives
HARD DISK PERFORMANCE
HARD DISK PREPARATION
CLEANING AND PREVENTIVE MAINTENANCE
Determining When to Perform Maintenance
Automating Preventive Maintenance
DISASSEMBLY ROUTINE
(A) Procedure:
GUIDELINES FOR RE-ASSEMBLING YOUR PC
TROUBLESHOOTING THE BOOT PROCESS
SYSTEM CONFIGURATION
SYSTEM BIOS
POST
CMOS SETTINGS
CMOS /BIOS ADVANCED SETTINGS
JUMPER SETTINGS AND CABLE LAYOUT
INTERRUPTS
Choosing an interrupt
Sharing Interrupts
Non-Maskable Interrupts (NMI)
DIRECT MEMORY ACCESS (DMA)
Bus mastering
I/O ADDRESSES OR BASE I/O PORTS
MEMORY ADDRESSES (BASE MEMORY ADDRESS
DETERMINING RESOURCES IN USE
RESOURCE CONFLICTS