1. Principles of Technology
Unit 3- Maintaining & Protecting Hardware

2. Objectives Identify the importance of keeping a computer clean.
Explain what is needed to clean a PC.
Identify the importance of protecting computer hardware from theft and damage.
Make a secure password.
Protect a computer against viruses.
Explain how to backup data.
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.

3. Why Keep the PC Healthy? How much do computers cost?
You want to protect your investment
Easy to maintain
Keep it physically clean
Protecting it from bad software
Protect/Backup your files

4. Dirty Screen What makes the screen dirty? LCD/LED screens (Non-glass)
NEVER spray liquid or Windex!
Ruins the anti-glare coating
Can leak into monitor

5. Cleaning the Screen Pre-moistened Wipes Spray & Cloth
Spray liquid onto microfiber cloth
Use on LCD/LED, cell phone screen, Tablets, photo frames, etc.

6. Dirty Keyboard What makes the keyboard dirty?
Could cause it not to work

7. Cleaning the Keyboard Unplug, turn upside down & shake Use wipes
Use compressed air
Use wipes
Spill?
Disconnect, turn upside down to drain
Sticky?
Hold on side & rinse
Drain for 2 days

8. Dirty Mouse Can get sticky & dusty on bottom Sticky/dirty on top
Causes erratic movement
Sticky/dirty on top

9. Cleaning the Mouse
Use wipes

10. Review
Your laptop screen is dirty. Why should you NOT use Windex to clean it?
Ruins the anti-glare coating & can leak inside
What can be used to get food particles & dust out of your keyboard?
Compressed air
When cleaning an LCD screen with a liquid pump spray, how do you apply the spray?
Spray onto the cloth

11. Dirty Computer Case
Dust & dirt build-up
Clogged fans

12. Cleaning the Case Use compressed air Vacuum outside case only
DON’T blow dust inside PC!
Dust keeps PC hot
Vacuum outside case only
Anti-static vacuum inside
Wipes to clean surface

13. Cleaning Your Laptop
Keep the expensive laptop clean!

14. Review How can dust damage your computer?
Clogs up fans; causes overheating
Vacuuming the inside of a computer with a regular vacuum cleaner can cause what kind of damage?
Static electricity can damage components
When using compressed air to clean dust from computer fans, how should you do this?
Blow dust outside of the computer, not in

15. Organizing Cables
Organizing cables under desk
Velcro wire-ties

16. Laptop Care Take in air on bottom, expel heat out back Cooling Stand
Keeps cool air going in
Prevents overheating
Padded Bags
Protect when carrying

17. Protect from Theft Kensington Lock Secure physical devices
Businesses or Personal use

18. Protect from Theft Tracking Software Identify location of computer
Alarm sounds
Lock device remotely
Erase data remotely
Remote camera activation

19. Protect from Environment
Overheating- temp should be kept under 85 degrees; damages components
ESD- don’t touch internal components without proper ESD strap or knowledge
Physical damage- be careful, use padded cases, etc.
Liquid damage- keep beverages away from computer

20. Project
Shop for maintenance accessories

21. Power Strip
Allows many plugs into one
Not recommended!

22. Protect from Electrical Damage
Surge or Spike
Too much electricity
Lightning strike or power fluctuation
Power Outages
No electricity

23. What’s a surge?
An increase in voltage significantly above the designated level
Surge Protector diverts extra voltage like a valve

24. Surge Suppressor AKA Surge Protector What to look for?
Better than Power Strip
What to look for?
# of outlets
Joule rating
More joules better protection
Cord length
Noise filter
$$ protection warranty
Noise- unwanted/extra electricity on the lines. Sources include microwave, vacuum cleaner, wireless products, etc. Noise interferes with normal electrical signals.

25. Surge Protector Features
# of Outlets
Length of cord
# of Joules
Connected equipment warranty $$

26. UPS Uninterruptable Power Supply
Battery backup PLUS surge protection & noise filter
Will power equip until you can save & shutdown
10-20 min.

27. Project Find a single outlet surge protector for your laptop
Find a 6-8 outlet surge protector (strip or wall) for computers with at least 2500 joules
Find a surge/UPS strip with at least 10 minutes of backup time
Comparing Surge Protectors Handout (group)
Surge Protector Homework Handout

28. Passwords
Don’t use easy, common words
Mistakes:

29. Strong Password Checker from Microsoft
Password Tips
Most common password is…password
Also
Tips & Advice:
Top 25 worst passwords of 2013
Strong Password Checker from Microsoft
Students should name some tips.
Never use personal information such as your name, birthday, or spouse's name. Personal information is often publicly available, which makes it much easier for someone to guess your password.
Use a longer password. Your password should be at least six characters long, and for extra security it should ideally be at least twelve characters (if the site allows it).
If you need to write down your passwords, keep them in a secure place. It's even better if you "encrypt" your passwords or just write down hints for them that others won't be able to understand.
Don't use the same password for each account. If someone does discover your password for one account, all of your other accounts will be vulnerable.
Try to include numbers, symbols and both uppercase and lowercase letters (if the site allows it).
Avoid using words that can be found in the dictionary. For example, "swimming1" would be a very weak password.
Random passwords are the strongest. Use a password generator instead of trying to think of your own.
Random passwords are harder to remember, so create a mnemonic device. For example, "H=jNp2#" can be remembered as "HARRY = jessica NOKIA paris 2 #." This may still seem random, but with a bit of practice it becomes relatively easy to memorize.

30. Anti-virus Protection
Prevents virus install & helps remove it
Enable auto-update
New virus’ made everyday
Be careful what you download
AV might not catch them all
Name some AV software

31. Anti-virus Software Project
Office Max
McAfee Antivirus Plus & 3-user
Kaspersky Internet Security 3-user
Staples
Norton Internet Security user
McAfee Total Protection 2013
Best Buy
Walmart
McAfee Antivirus Plus user
Norton Antivirus user

32. Protect Your Data What files are important to you?
Data is very valuable
Backup data
External drive
Online
Online backups- carbonite, backblaze

33. Backup Your Data Image= Windows, Programs, Settings & Files
Used if entire drive stops working
The system image must be saved on a hard drive.
Files= your pics, songs, files
The files can be saved on a flash drive, CD/DVD, external hard drive, network.
Win 7
Mac
Win 7 Image
Win 7 Files

34. Project How to Backup Data & Images In groups of 2
Make a 1-2 page EASY instruction sheet with pictures
Keep it organized with pictures under each step or to the right
After checked, save as a PDF

35. Review Which is a better password?
Mcdonalds1
puppydog
28Cr38teR_!
What 2 jobs does AV software perform?
Prevents virus install & removes it
What 2 things can you back up on the PC?
Image (programs & settings) and files

36. Common Problems
What are some common problems people have with computers?

37. Hardware Issues Crashed HD Damaged media Printer Problems
Overheat, dropped, shaken, wear out
Damaged media
Scratched CD/DVD
Dusty flash drive, banged around
Printer Problems
Paper jams
Low ink or toner

38. Hardware Issues Display problems Loss of network Incompatible device
Check power
Check video cable
Loss of network
Loose cable
Wireless down
Incompatible device
Check if it’s plugged in

39. Routine Maintenance Visual Inspection Check cables Plugged in
Good condition
Inside computer too

40. Care for Removable Media
Avoid extreme temperatures
Don’t touch media surface
Hold optical disks at edges
Keep disks in case when moving them

41. Useful Life Personal PC: 3-5 years Special Recycle Donate
Check with town/county
Donate
Also recycle ink/toner

42. Buy or Upgrade Consider the costs to upgrade versus a new PC
8GB RAM= better performance; you have 4GB
You need 4GB more RAM & a 1TB hard drive
RAM: $50
Hard Drive: $100
New computer would cost: about $500
Is it worth it? Is your PC in good shape & performing well?
Is it doing what you want it to do normally ok?

43. 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
Examples: Store lots of photos- large hard drive; Video Editing- RAM, CPU, HD, USB 3.0, Dual Monitors; Business or school standards- maybe needs a certain OS

44. Support & Warranty Tech support (for the hardware, not OS)
Company will help you troubleshoot
Free for a time period
Then, may charge per call/per hour
Written guarantee for a time period
If product doesn’t work, manufacturer will repair/replace
Normal wear & tear
Does NOT cover damage you do
Return Policy is a time period when you can get your money back from where you bought item. Usually 14 days, 30 days, or 90 days. Product must be in re-sellable condition and complete. Some stores charge a re-stocking fee on non-defective electronic items.
Product Support
Product Warranty

45. Upgrading Components New keyboard, mouse (check connections)
Anyone can add themselves
Add RAM or Drives/Cards
May require pro to install
Show Memory Configurator & show how to look up brand/model/price if memory upgrade. For homework, they should find the brand/model of their computer.

46. Project Buying a Computer Recycling
Each student will get a budget amount
Meet requirements given
Add to your “My Computer” PPT
Slide 1= budget & requirements
Slide 2= brand, model, specs, picture, price
Recycling
Look up your town’s/county’s computer recycling program
Describe what to do with items

47. Solving Problems What do you do when your computer has a problem?
Nothing
Call someone you know
Look it up
Fix it yourself
Buy a new computer
You should troubleshoot!

48. My Troubleshooting Example
On boot, message popup
Unable to load library wxfw.dll. Attempted to load <Key not found>\wxfw.dll.Error code:126
Search online for wxfw.dll
Found it was from a Desktop Weather Program
Found program & uninstalled
Reboot & no error

49. Troubleshooting Identify the problem (What’s the problem?)
Check Basic Solutions
Cables plugged in, just restart it, out of ink
Research for help & support
Internet, boards, tech support site
Talk to a technician & follow their instructions
Confirm it’s fixed
Document problem/solution

50. Troubleshooting Examples
PROBLEM:
Hard drive makes unusual sounds
Cause & Solution?
PROBLEM:
Computer does not start at all
Cause & Solution?
PROBLEM:
Beeps during POST
Cause & Solution?
PROBLEM:
Newly installed software doesn’t start
Cause & Solution?
PROBLEM:
OS does not start
or starts and freezes
Cause & Solution?
1: Cause- files failed to load; Solution- restart PC, update OS
2: Cause- corrupt or missing files; Solution- uninstall & then reinstall software
3: Cause- possible CPU, RAM, or Video card error; Solution- check for proper install or damage
4: Cause- dropped or ready for failure; Solution- backup data ASAP and replace
5: Cause- might not be plugged in, bad power supply, bad motherboard; Solution- check cable, check outlet, replace PSU or Mobo

51. 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?

52. Review Which device protects a computer from electrical surges?
Surge suppressor
What rating on a surge protector identifies the amount of extra electricity it can handle?
Joules
UPS stands for what?
Uninterruptable power supply
What is the purpose of a UPS?
Gives you time to save files & safely shut down when the power goes out

53. Review When troubleshooting, what would a basic solution be?
Checking the cables to see if they’re plugged in
What is the last step in troubleshooting?
Document the problem/solution
T or F. When you have a problem, you should contact tech support immediately.
False

54. Principles of Technology
Unit 3- Maintaining & Protecting Hardware