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Computing Fundamentals
Unit 3- Maintaining & Protecting Hardware
Identify the importance of protecting computer hardware from theft and damage.
Explain how to protect data. Identify environmental factors that can cause
damage to computer hardware & media. Identify how to protect computer hardware from
power loss. Identify common problems associated with
computer hardware. Identify routine maintenance tasks. Define problem solving & identify the steps. Identify criteria for selecting a computer.
Objectives
Protect from Theft Secure physical devices Businesses or Personal use
Cooling Stand
Padded Bags
Protect From Damage
Data is very valuable to businesses
Can occur in theft & when old system are trashed
Encrypt data◦ On computer◦ Keeps data private w/out key
Backup data◦ Daily◦ On-site & off-site
Protect Your Data
System image and Files◦ Image= Windows, Programs, Settings & Files
Used if entire drive stops working The system image must be saved on a hard drive.
◦ Files= just files The files can be saved on a flash drive, CD, DVD, or a
hard drive.
Backup on Windows 7
Temperature◦ Not too hot
Humidity◦ Can cause rust
Water Magnetic fields
◦ Can erase HD Static electricity
◦ Can damage components◦ No rugs
Environmental Protection
Protect Hardware◦ Power surge or spike◦ Power outage◦ Theft
Protect Files◦ Online backup◦ CD/DVD backup
Protect from Damage
What’s a surge? An increase in voltage significantly above
the designated level
Surge Protector diverts extra voltage like a valve
AKA Surge Protector◦ Different from Power Strip◦ Check Joule rating
More joules better protection◦ Has warranty $$◦ Noise Filter
Surge Suppressor
UPS Uninterruptable Power
Supply
Battery backup & surge
Will power equip until you can save & shutdown
What device will keep your laptop from overheating?◦ Cooling Pad
What security measure can protect transmitted data?◦ Encryption
What device will allow you time to save & shutdown your PC when the power goes out?◦ UPS
An increase of voltage above normal levels is called what?◦ Spike or a surge
Review
Compare Surge Protectors How to Backup Data Surge Homework
Projects
Crashed HD◦ Overheat, dropped,
shaken, wear out
Damaged media◦ Scratched CD/DVD◦ Dusty flash drive,
banged around
Printer Problems◦ Paper jams◦ Low toner
Hardware Issues
Display problems◦ Check power◦ Check video cable◦ Bad driver
Loss of network◦ Loose cable◦ System down
Incompatible device◦ New device needs driver◦ Check if it’s plugged in
Hardware Issues
Routine Maintenance Organizing cables under desk Velcro wire-ties
Routine Maintenance Visual Inspection
◦ Check cables Plugged in Good condition Inside computer too
Routine Maintenance Dust
◦ Clogs fans◦ Fans cools parts down◦ Overheat= shutdown◦ Compressed Air
Dusty!
Routine Maintenance Wipes
◦ For monitors◦ No tissues or towels (lint/scratch)◦ No glass cleaners
Keyboard◦ Turn upside & shake◦ Compressed air◦ Unplug, spray with
water, shake out & dry
Mouse◦ Ball rollers dirty◦ Wipe bottom of
optical
Clean Keyboard & Mouse
Care for Removable Media
Keep away from electrical fields (TV/monitor)
Avoid extreme temperatures
Don’t touch media surface
Hold optical disks at edges
Keep disks in case when moving them
Review 1
Review 2
Routine Maintenance Costs Find Your Specs
Projects
Buy or Upgrade Consider the costs to upgrade versus a new
PC
You need 2GB RAM & a bigger hard drive RAM: $50 Hard Drive: $100
New computer: $500
Buying a Computer
What to consider◦ Who is using it?◦ What will it be used for?◦ List the tasks, software
Check requirements◦ Portability or not◦ MAC or PC◦ Brand/Reliability◦ Storage devices◦ Peripherals- how many?◦ Warranty/Support
Support◦ Company will help
you troubleshoot◦ May charge per
call/per hour
Buying a Computer Warranty
◦ Written guarantee◦ If product doesn’t
meet specs, manufacturer will repair/replace
◦ Does NOT cover your damage
Upgrading Components
Add RAM New keyboard, mouse (connections) Drives/Cards
◦ May require pro to install
Useful Life Public- 3-5 years Special Recycle
◦ Check with town/county Donate
Review
Buying a Computer Recycling
Project
Troubleshooting Example
On boot, message popup◦ Unable to load library wxfw.dll. Attempted to load
<Key notfound>\wxfw.dll.Error code:126
Search online for wxfw.dll Found it was from a Desktop Weather
Program Found program & uninstalled Reboot & no error
Troubleshooting
1. What is the problem2. Check Basic Solutions
◦ Cables, restart
3. Look or research for help & support4. Talk to a technician5. Follow their instructions6. Confirm it’s fixed7. Document problem/solution
Troubleshooting Scenarios- Check the basics
The entire computer has completely frozen up. I can't click anywhere on the screen. I can't even use the Start button to shut it down. ◦ Ctrl + Alt + Delete
I press print & the printer does not respond at all.◦ Check the cables; what other solutions?
Review Which device protects a computer from
electrical surges?◦ Surge suppressor
Which component has an RJ11 jack?◦ Modem
Which component has a 15 pin female connector?◦ VGA
Review A legacy printer would be plugged into which
port?◦ Parallel
When troubleshooting, what would a basic solution be?◦ Checking the cables
What is the last step in troubleshooting?◦ Confirm the problem is fixed
Review 1
Review 2
Computing Fundamentals
Unit 3- Maintaining & Protecting Hardware