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IC3 - Computing Fundamentals
Transcript of IC3 - Computing Fundamentals
Global Positioning Satellite
Small/Large home appliances Elements of a Computer System Unit - often most important and expensive part Microprocessor Memory - measured in bits and bytes 1 Kilobyte=1,024 Bytes
1 Megabyte=1,048,576 Bytes
1 Gigabyte=1,073,741,824 Bytes
1 Terabyte=1,099,511,627,776 Bytes
1 Petabyte (PB)=1,125,899,906,842,624 Bytes Bit is the smallest unit of data computer uses. Read Only Memory (ROM) Starting computer
Loading Operating System Random Access Memory (RAM) Temporarily stores software program currently using and data created in program
It is volatile Storage Systems - result of the need to be able to store information on computers Hard Disk Drives Optical Drives Tape drive Zip drive Flash drive Remote or Virtual Storage Using Input/Output Devices Input device - anything used to enter data into the computer Output device - anything used to display data on or from the computer Device Driver
Mini-program tells operating system what kind of device it is, what make or brand it is, and its purpose
Main purpose is to enable communication between operating system and device
Automatically identifies new device connected so it looks for and installs device automatically
If cannot find right driver, will need to use software that came with device or search for driver on Internet
Basic Troubleshooting Techniques Taking care of your computer
UPS (Uniterruptible Power Supply) - to protect PC from power surges, brownouts, or electrical failure.
Not too many devices connected to wall outlet or power bar.
When travelling, use a power converter.
Turn off PC during stormy weather.
Position PC in a better location to prevent it from being easy target of theft.
File server should be located in a room that can be locked and require special access for entry.
Do not store computing devices near a heat source or in a cold environment.
Avoid liquids near computing devices.
No magnetic items near the computer (includes TV and microwave oven).
Properly shutdown the computer.
Use care when travelling with a notebook or any portable devices.
Try to keep cables clear of walkways.
Occasionally, clean the computer and printer.
Always have backup of your data.
Woking with hardware
If you cannot open files from hard drive - could be hard disk has failed or crashed, and is no longer available.
Cannot read files from media such as CDs or DVDs - check disk for scratches or dirt.
Cannot print - check printer if connected, installed, or turned on.
If connetions active but printer does not print - check possible error messages like paper jam or empty ink.
Cannot log on the network - check user ID and password. Check if network is active. Check cables.
Newly installed hardware not working - not being connected properly, wrong device driver has been installed.
Increasing Computer's Performance
System resources are too low to process work - too many programs or files are open.
Hard drive is reaching capacity and not enough room to install programs or save files - free some space.
The file is quite large and will not open or close quickly - speed of your microprocessor and capacity of RAM.
Performing Basic Troubleshooting
Collecting information - write the information down for reference, especially the exact wording of any error messages.
Analyzing the information
Attempting the basic solution
Communicating the problem accurately
Analyzing and selecting proper action
Implementing the solution
Confirming the problem is fixed
Documenting and communicating the incident
Avoiding similar problems in the future Buying a Computer
Determining the purpose - how will this computer be used and by whom? Hardware Computer Specifications
Processor: Intel Core i5-750 quad-core processor 2.66GHz
Hard drive: 500GB - 7200RPM SATA II
RAM: 6GB DDR3-1333MHz SDRAM
Display: 17.0" WXGA LED Backlight TFT 1366x768
Graphics: XFX GeForce 7300 GT 512MB DDR2 PCI Express Video Card
Optical Device: 20X DVD±RW Dual Layer drive
Processor: Intel Core i3-380M Processor 2.53GHz
Hard drive: 500GB - 5400 RPM SATA II
RAM: 4 GB PC3-8500 DDR3 SDRAM 1066MHz
Display: 14.0"" WXGA LED Backlight TFT 1366x768
Graphics: Intel HD Graphics shared 256MB
Optical Device: DVD Recordable (Dual Layer) Software Specifications
Operating Platform - Windows? Mac OSx?
Application software - MS Office 2007, media player, Adobe, etc. Looking at support options
New computers - usually 1 year warranty
Warranty does not cover damage caused by careless actions.
Support agreements - less pay for each repair.
Extended warranty Useful life of a computer is considered to be minimum of 2 to 3 years. Server