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Chapter seven trouble and repair computer manual

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  • thank you..this would help me a lot in project..God bless.
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  • 1. Chapter Seven Maintenance and Trouble shooting
  • 2. Preventive Maintenance
    • Ventilation
      • Air conditioned rooms (Server and Lab)
      • Keep vents open
    • Dust
      • Vacuum cleaners
      • Air compressor
      • Cleaning Cloths
    • Hard disk
      • Defragmenting
      • Running Check disk Scan
      • Running Disk clean up
      • Running Anti-Virus Programs
      • Avoid Vibration and Shock
  • 3. Cont’d
    • Use power protection devices
      • UPS (Uninterrupted Power Supply)
      • Suppressor
    • Backing up data
      • Use Backup devices (Zip, Tape, CD & DVD)
      • Use Backup software
    • Floppy, CD Drives
      • Use cleaning kits based on manufacturer recommendations
      • Use Marker for Labeling (CD)
  • 4. Scheduled Tasks
    • Are tasks that must be done periodically to keep your system running smoothly. After performing this action the system will regain it original performance.
    • Weekly Scheduled task
      • Running Virus scan
      • Running Automatic Updates
      • e.g. Anti Virus, Browser
      • the software may provide scheduling services or may initiate updates when the system is turned on.
      • Cleaning Keyboard, Mouse, Mouse Pad and Monitor from dust
  • 5. Cont’d
    • Monthly Scheduled tasks
      • Running scan disk
      • Running disk clean up (provides removal of Temporary internet files)
      • Running disk Defragmentation.
      • Deleting of cookies from the browsers (Here there is an option of removing your passwords which you don’t want to do it now, but when you are changing your system for some reason don’t forget to remove them. Also if it is a shared system do store any of your password)
      • Backing up your data.
      • Creating system restore points.
  • 6. Cont’d
    • Annually scheduled tasks
      • Checking the functionality of each system components like Floppy & CD Drive, Sound card, Fans, etc
      • Removing dust from the internal system. Keep in mind that most components will get loose. There is also a probability of damaging them.
      • Updating and Recovering the operating system components. (Formatting is considered as the last option because it will have an impact on the life time of the hard disk and every body wants its data, software and settings left intact)
      • Upgrading your systems components. E.g. increasing RAM, Hard disk size or from CD-ROM to CD-RW, etc
  • 7. Cont’d
    • Remember some of the tasks can be done in different ways as per the persons or organizations requirements. E.g. in school environments the annual task may be done on semester base, and software that keeps the original setting every time the system restarts may be used (like freezer).
  • 8. Troubleshooting your system
  • 9. When will a PC fails to Work?
    • A change has been made to the System.
      • New device installed
      • New software installed
      • Downloaded a software from the net. (Screen saver may be)
    • An important files has been deleted for some reason.
    • The PC is too old
    • The system Unit has been opened
      • For preventive maintenance routine
      • To introduce or maintain a device (like NIC)
  • 10. Cont’d
    • The PC is brand new or a newly assembled one. In both case a component may be missing or it may be wrongly fixed.
    • Poor power supply, keyboard or mouse.
    • System has been shacked, vibrated or knocked.
    • Power went wrong (high may be).
  • 11. Do you know the purpose of
    • Ctrl+Z or Undo, Ctrl+S
    • Esc
    • Task manager or Ctrl+Alt+Del
    • msconfig
    • Restarting
    • Ctrl, Alt, Windows, Tab, & Function keys, and their combination like Alt+Tab, Alt +F4, Ctrl+O, Alt+space bar
    • On Screen keyboard
    • In short, what to do when the computer stacks, keyboard or mouse doesn’t work?
  • 12. The “R” solutions
    • If a file is deleted (only delete not shift+delete) and you want to recover it go to Recycle Bin .
    • If a program is missing use System Restore and restore the system to previous restore point.
    • If an application is not working save all files in another location and Reinstall the application.
    • If your Hard disk or flash asks you to format it, format it and use a Recovery Software to restore your files.
    • If your system crashed and you have organized it with new operating system Restore files from a Back up set.
  • 13. Is it a Hardware or software Problem?
    • A) Hardware B) Software
    • A A printer breaks down and stops working.
    • B A printer prints from a word program but not from Adobe.
    • B PC locks up when you open the same program again and again.
    • A Computer shuts it self off half an hour after you start running any program
    • _ CD-ROM drive no longer slides open.
    • _ Enter key doesn’t work.
    • _ Mouse stops working on only one program.
  • 14. Question Based Trouble Shooting
    • Problem One
    • Display is Black, No sound from the speaker and the system doesn’t boot.
    • Solutions
    • Power
      • Check power
      • Check power connector to Case and Monitor
      • Check the Battery (Laptops)
    • Monitor
      • Check connection b/n PC and Monitor
      • Check brightness and Contrast setting
    • System Unit
      • Check the lights of the drive
    • Check the CMOS Battery
  • 15. Cont’d
    • Short on motherboard, bad power supply or Speaker connected wrongly
    • Verify all the Expansion slot are placed properly
      • Chip creep is caused by thermal expansion and contraction which happens during the heating and cooling of components, and causes components such as removable chips to shift position or work their way out of their mounting clips.
  • 16. Cont’d
    • Try unplugging & disconnecting everything except mother board, PC speaker and Video card.
    • Try different power supply
    • Replace RAM
    • Try different CPU
    • Replace Mother Board
  • 17.
    • Problem Two
    • The system is booting but no display
    • Solutions
    • Check monitor is on.
    • Check monitor is connected to PC.
    • Check for brightness & contrast
    • Replace Video card
    • Replace Monitor
    • Change VGA Slot
  • 18.
    • Problem Three
    • The system emits a series of beeps
    • Solutions
    • Check the beep codes in the mother board manual.
    • Problem Four
    • The screen displays a numeric error code. (Rare case-only in Modern system)
    • Solution
    • Check the codes in the mother board manual.
  • 19.
    • Problem Five
    • System Restarts after loading the OS
    • Solutions
    • Try log in with safe mode
      • Remove any lastly loaded software
      • Recover the system to previous restore point
    • Remove any newly added Hardware
    • Check the fans. (Power supply, case and Processor)
  • 20.
    • Problem Six
    • Blue screen with an error message
    • Reason
    • Most likely case after power failure.
    • Solution
    • Use a bootable disk to recover
    • Problem Seven
    • Missing a file message
    • Solution
    • Use a bootable disk to recover
    • Coping the missing file
  • 21.
    • Problem Eight
    • Non-System Disk error
    • Solutions
    • Check the FDD
    • Check the Flash Drive
    • Problem Nine
    • Windows was not properly shut down
    • Solutions
    • Restart the computer
    • Automatically starts scandisk
  • 22.
    • Problem Ten
    • Not enough Memory or Insufficient Memory-Virtual memory
    • Solutions
    • Closing Windows
    • Restart/Reboot
    • Problem Eleven
    • No sound comes from the system
    • Solutions
    • Check for Mute (software & Hardware)
    • Check the Device Driver
  • 23.
    • Problem Twelve
    • Machine/System is freezing
    • Solutions
    • Close applications using task manager
    • Reboot the system
    • Problem Thirteen
    • System asks for the date and time always and save the changes made on the system
    • Solution
    • Change the CMOS battery
  • 24.
    • Problem Fourteen
    • When I'm opening a web browser what I'm seeing is an advert/ offensive page, a pop up page and etc. Check the other symptom form www.infopackets.com/news/security/2005/20051115_spyware_infection_symptoms.htm
    • Reason
    • An ad software is installed in your system
    • Solution
    • Change the your Home page address back.
    • Try to remove an known process from the task manager.
    • Disable unknown programs form msconfig startup files.
    • Download an anti spyware and malware software and scan your system.
  • 25.
    • Problem Fifteen
    • When I'm running a program it displays an error code.
    • Reason
    • Missing component or already running process
    • Solution
    • Try to run a missing component. E.g. start server before running server script program.
    • Close pervious result windows or end executions.(eg visual basic)
    • Install missing component.
    • Use a stable version software.
    • Reinstall the software.
  • 26.
    • Problem Sixteen
    • Device is not recognized (extra Hard drive, CD & Floppy drive, Flash, etc)
    • Solution
    • Check the following
      • driver for the device. There will be a yellow “?” mark in device manager for that device if not installed or corrupted. Red “X” for disabled.
      • is power on or not if applicable. (digital camera)
      • the cable connection b/n the device and the system.
      • power connection or battery for the device.
      • the device if it is a working one.
    • Change a port (for external device) or slot (for internal device).
  • 27.
    • Problem seventeen
    • I can’t see the start menu and any of the icons on desktop.
    • Solution
    • Press Ctrl+Alt+Del  Task manager  file  new task(run …)  type “explorer”  hit Enter. If an error message displayed the file has been deleted or altered.
    • Restart the system.
    • Restore or Recover your system.
  • 28. IBM based systems beep codes
    • No beep, Continuous beep & repeating short beeps-Power supply, System board.
    • One short beep- Normal Post-Ok
    • Two short beeps-Post Error
    • One long and one short beep-System board
    • One long and two short beep-Display Adapter