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1 Git Project


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1 Git Project

  1. 1. Department of Information Technology GTC HMAW BI A.G.T.I PROJECT Group 6 November, 2005
  2. 2. Computer Maintenance and Repairing <ul><li>Supervisor </li></ul><ul><li>Daw May Nwe Thwin </li></ul><ul><li>Memberships </li></ul><ul><li>Toe Kyaw Kyar </li></ul><ul><li>Linn Htet </li></ul><ul><li>Aung Mon Htun </li></ul><ul><li>Kyaw Htun </li></ul><ul><li>Kyaw Zay Hein </li></ul><ul><li>Soe Minn </li></ul><ul><li>Ye Minn Oo </li></ul><ul><li>Zin Mar Nu </li></ul><ul><li>Wutt Ye Myint Thein </li></ul><ul><li>Thin Nwe Soe </li></ul>
  3. 3. How To Maintain Your PC System Yearly <ul><li>Make sure air vents are clear. </li></ul><ul><li>Use compressed air to blow the dust out of the case or use a vacuum to clean vents, power supply, and fan. </li></ul><ul><li>Ensure that chips and expansion cards are firmly seated. </li></ul><ul><li>Clean the contacts on expansion cards. </li></ul>Inside the case How often Maintenance Components
  4. 4. Power Supply System Always <ul><li>The power supply should monthly be cleaned up by means of compressed air or brush to remove the dust. </li></ul><ul><li>Beware of water vapour. </li></ul><ul><li>Disconnect the power cord from the wall outlet if your system is in unused. </li></ul>Power supply How often Maintenance Components
  5. 5. Processor (CPU) Fig. 1 Fig. 2 Always <ul><li>Regularly check the fan on the processor </li></ul><ul><li>Use thermal paste compound between the processor and heat sink to dissipate more heat. </li></ul>Processor How often Maintenance Components
  6. 6. Motherboard Always <ul><li>Remove any unused add in cards. </li></ul><ul><li>Ensure that chips and expansion cards are seated. </li></ul>Motherboard How often Maintenance Components
  7. 7. Monitor Always <ul><li>Do not expose the monitor to direct sunlight or heat. </li></ul><ul><li>Do not spill liquid on the monitor. </li></ul><ul><li>Do not attempt to open the monitor. </li></ul>Monitor How often Maintenance Components
  8. 8. Monitor Always <ul><li>Do not use harsh chemicals or strong cleaning solvents to clean the monitor screen. Wipe it with clean, soft clothes. </li></ul><ul><li>Do not place anything on your monitor. </li></ul><ul><li>Bad ventilation may elevate temperature in the monitor. </li></ul>Monitor How often Maintenance Components
  9. 9. Keyboards Monthly Always <ul><li>Keep the keyboard clean. </li></ul><ul><li>Keep the keyboard circuitry away from liquid. </li></ul><ul><li>Do not perform plugging or unplugging keyboard when the power is on. </li></ul>Keyboards How often Maintenance Components
  10. 10. Mice Monthly <ul><li>You should clean the rollers and ball inside the mouse monthly. </li></ul><ul><li>If your mouse is optical mouse clean the dust attached at the optical sensor. </li></ul>Mouse How often Maintenance Components
  11. 11. Hard Disk Drives At least weekly. Always <ul><li>Perform regular back up </li></ul><ul><li>Don’t allow smoking around the PC. </li></ul><ul><li>Place the PC where it can not be jarred, kicked, or bumped. </li></ul>Hard disk Drive How often Maintenance Components
  12. 12. Hard Disk Drives At least daily. Monthly Weekly <ul><li>Automatically execute a virus scan program at startup. </li></ul><ul><li>Defragment the drive and recover lost cluster regularly. </li></ul><ul><li>Clean the disk by the use of Disk cleanup utility. </li></ul>Hard disk Drive How often Maintenance Components
  13. 13. Floppy Disk Drives When the drive fails. <ul><li>Clean the disk head when the drive does not work. </li></ul>Floppy disk Drive How often Maintenance Components
  14. 14. Memory (RAM) Fig. SIMM Fig. SDRAM DIMM Fig. DDR RAM DIMM Always When the memory has a problem. <ul><li>Ensure memory cards are seated at their slots. </li></ul><ul><li>Rub the metal contact with eraser. </li></ul>Memory How often Maintenance Components
  15. 15. Expansion Cards Fig. Graphic Cards Always When the particular card has a problem <ul><li>Ensure any expansion cards are seated at their slots. </li></ul><ul><li>Rub the metal contact with eraser </li></ul>Expansion Cards How often Maintenance Components
  16. 16. Software Regularly At least monthly <ul><li>Delete files from your Recycle Bin and temp directory. </li></ul><ul><li>Delete any temporary files in the DOS directory. </li></ul>Software How often Maintenance Components
  17. 17. Written Record Whenever changes are made. <ul><li>Keep a record of all software. </li></ul><ul><li>Keep a record of all hardware components installed. </li></ul><ul><li>Record when and what preventive maintenance is performed. </li></ul><ul><li>Record any repairs done to the PC </li></ul>Written record How often Maintenance Components
  18. 18. How to repair yourself <ul><li>Troubleshooting Tools </li></ul><ul><li>Bootable rescue disk </li></ul><ul><li>Antistatic ground mat </li></ul><ul><li>Flat-head screwdriver </li></ul><ul><li>Cross-head screwdriver </li></ul><ul><li>Multimeter </li></ul><ul><li>Needle-nose pliers </li></ul><ul><li>Small cups to keep screws </li></ul><ul><li>Antistatic bags to store unused parts </li></ul><ul><li>Pen and paper for taking notes </li></ul><ul><li>Diagnostic cards </li></ul><ul><li>Utility software such as Nuts and Bolts utility </li></ul><ul><li>Virus detection software on disks </li></ul>
  19. 19. Basic Troubleshooting Flowchart Does the PC boot properly? No Yes Is the screen Blank? Troubleshoot the system that is not working. Yes Can you hear the drive or fan spinning, or see light? No Is there an error message on the screen? No Start by troubleshooting the power system. Can you hear a single beep during boot? Yes Start by troubleshooting the system board. Yes Start by troubleshooting video. Respond to the error message. Eliminate the unnecessary Perform a “clean boot”. No No Yes
  20. 20. Sample Beep Codes Beep Code for CPU Problem Beep Code for AGP Problem Beep Code for Memory Problem
  21. 21. Using Diagnostic Tools Power off: Remove all the cards that plugged in expansion slots. Insert the card into ISA or PCI slot Power on: Make sure the LED runs properly. Whether the error code is displayed Power off: Insert the display card, I/O cards, keyboard, hard drive and expansion cards. Power on: whether the error code is displayed. If it can’t boot an OS, problem may be software, drives, disk controller or DMA circuit. Refer to description of LED display According to the error code table.
  22. 22. Test the gray wire of the power connector to have nearly +5 V rating. If not, replace the failed power supply with higher wattage rating. Due to the power supply The system reboots itself. Replace the power supply with higher wattage reating Due to low voltage power supply The power supply is overheating. Solution Cause Symptom
  23. 23. <ul><li>Lock up your system. Set the correct voltage selector setting. </li></ul><ul><li>Ensure not to loose screws in the case. </li></ul><ul><li>Remove the drive or any add-in cards and retest one at a time. </li></ul><ul><li>Due to wrong voltage </li></ul><ul><li>Due to shorting in the case. </li></ul><ul><li>Due to bad drives and added in cards. </li></ul>Power supply fan turns for only a moment and then stop. Solution Cause Symptom
  24. 24. Power off your system immediately. Wait for a while and try again. If your power supply still has some odour , replace the power supply with the higher capacity power supply. Due to power supply. Some odour comes out from your power supply. Solution Cause Symptom
  25. 25. <ul><li>Test and replace the power supply. </li></ul><ul><li>Test and replace the motherboard. Before installing a new motherboard, test the out put voltage of the power supply to have its correct voltage level. Wrong voltage can make motherboard damaging. </li></ul><ul><li>Due to power supply. </li></ul><ul><li>Due to motherboard </li></ul>Nothing can be seen on the screen. Solution Cause Symptom
  26. 26. <ul><li>If there are bent or missing pins. Replace the data cable. </li></ul><ul><li>Press any key on the keyboard or move the mouse. </li></ul><ul><li>Test and replace the CPU </li></ul><ul><li>Pins from signal cable connector. </li></ul><ul><li>The monitor is in the power save mode. </li></ul><ul><li>Due to CPU </li></ul>Nothing can be seen on the screen. Solution Cause Symptom
  27. 27. Check the fan to operate properly. If the processor has failed fan, replace a couple of processor and fan. It can be due to processor overheating. The system works properly for only a moment and then hangs up . Solution Cause Symptom
  28. 28. <ul><li>Replace a pair of heat sink and fan with higher capability. </li></ul><ul><li>Set these setting to the correct configuration. </li></ul><ul><li>It can be due to heat sink and fan on the processor. </li></ul><ul><li>Due to wrong voltage setting </li></ul><ul><li>It can be due to wrong bus speed. </li></ul><ul><li>It can be due to CPU clock multiplier. </li></ul><ul><li>The system does not boot up properly. </li></ul>Solution Cause Symptom
  29. 29. BIOS should be updated. It can be because of old model of BIOS. Improper CPU identification during POST. Solution Cause Symptom
  30. 30. <ul><li>This can be solved by reinstalling the related software driver.. </li></ul><ul><li>Disable the onboard device via the BIOS setup screen. And also add the add-in device to operate normally. On some condition, spoiled device can affect the board not to usable. </li></ul><ul><li>It can be the effect of failing of onboard driver. </li></ul><ul><li>It can be damaging of onboard devices. </li></ul>Device manager can’t detect the onboard sound, VGA and ports. Solution Cause Symptom
  31. 31. <ul><li>Replace with a correct one if they are not operative. </li></ul><ul><li>If there are bents or missing pins, consult your place of purchase. </li></ul><ul><li>Check whether the setting are made properly. </li></ul><ul><li>Change the setting of your graphics card to acceptable options. </li></ul><ul><li>Remove the magnetic objects near the monitor. </li></ul><ul><li>Signal connector pin assignments. </li></ul><ul><li>Signal cable connector pins. </li></ul><ul><li>Graphics card. </li></ul><ul><li>Scanning frequency. </li></ul>The picture is scrolling or unstable. Solution Cause Symptom
  32. 32. <ul><li>Move the object away. </li></ul><ul><li>Use correct signal cable. </li></ul><ul><li>There are magnetic object nearby. </li></ul><ul><li>The pin arrangements of the signal connector aren’t correct. </li></ul>The color of image on screen is abnormal. Solution Cause Symptom
  33. 33. Testing the output voltage of the power supply <ul><li>Disconnect the power cables that go from power supply to the main board. </li></ul><ul><li>Connect the green wire at the connector and one of the black wires by the use of paper clip. The power supply will run at that time. </li></ul><ul><li>You can check the output voltage of the power supply main power connector with multimeter. </li></ul>
  34. 34. Useful cautions concerned with PC system <ul><li>You should never open the power supply case if you are not the electronic technician. The capacitors inside its case have very large capacitance. </li></ul><ul><li>Disconnect input power before servicing. </li></ul><ul><li>The processor that must be fitted into ZIF socket should not be forced. Forcing the processor can bend the pins. </li></ul>
  35. 35. <ul><li>The pins and socket must be correctly adjusted to install the processor into the socket. </li></ul><ul><li>The fan on the processor must turn on and connected to fan power connector on the motherboard whenever the system is operating. </li></ul>
  36. 36. <ul><li>Thanks are contributed to all of the audiences who attend to our presentation. </li></ul>