Pc hardware crash
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This document provides information on preparing a computer room, maintaining proper air quality, power supply, and preventative maintenance of computer systems. It discusses choosing an appropriate room location away from pollution and with sufficient space. It also covers topics like temperature and humidity control, surge protectors, jumper settings, and cleaning peripherals regularly. Common computer faults are explained like dead systems, spurious problems, and multiple faults. The document also gives an overview of diagnostic software, computer viruses, and anti-virus programs like Norton that can detect and remove viruses through automatic updates.
Pc hardware crash
- 1. Unit v TROUBLE SHOOTING PC By M.Abdul
- 2. ROOM PREPARATION AND POWER SUPPLY * ROOM PREPARATION IS VERY IMPORTANT FOR MAINTAIN THE COMPUTER . * LOCATIONS : * THE ROOM SHOULD HAVE ENOUGH SPACE FOR ALL THE USERS . * THE NUMBER OF ENTRANCES SHOULD BE LIMITED. * THE ROOM SHOULD BE AWAY FROM SMOKE OR OTHER POLLUTANTS . * THE ROOM SHOULD AWAY FROM RADIO FREQUENCY OR ANY RADIO SIGNALS . * THE ROOM SHOULD BE NEAR BY POWER DISTRIBUTION POINTS . * THE ROOM SHOULD BE PROVIDED WITH PROPER TELEPHONE
- 3. POLLUTION * POLLUTANTS LIKE DIRT , SMOKE , DUST ETC ,, ARE NOT GOOD FOR SYSTEMS : PRECAUTION : * CHAPPELS AND SHOES ARE NOT ALLOWED INSIDE THE COMPUTER ROOM. * USE VACUUM CLEANERS FOR CLEANING THE THE FLOOR. * ALWAYS KEEP THE DOORS OF COMPUTER ROOM IS CLOSED * DON’T ALLOW PEOPLE TO DRINK , EAT OR SMOKE CIGARETTE INSIDE THE COMPUTER ROOM * DON’T ALLOW LADIES WITH FLOWERS ON THEIR HAIR .
- 4. AIR CONDITIONING : * HEAT AND MOISTURE ARE THE TWO WORST ENEMIES OF COMPUTERS . * TEMP - 20 TO 25% . * HUMIDITY - 40 TO 60% . * This means , the room walls exposed to direct sunlight increases the capacity of the ac machine *
- 5. POWER SUPPLY * Power supplies are very important for maintain pc’s. Small problem make the major problems .* * dirty power enters into the system . * it lost the data and hardware components will be distroyed
- 6. PROBLEM DESCRIPTION POSSIBLE CONSEQUENCES surges Sudden temporary Serious damage or Increases in destuction of voltage. equipments. sags Sudden temporary Loss of data and/or reduction in voltage abnormal termination of program Brownout Prolonged Overheading of reduction in voltage components and it will decrease the components life . Blackout Complete loss of Complete loss of power system until power is restored. This causes the loss of data currently running on the system.
- 7. Voltage regulators * * Voltage regulators are electronic or electromagnetical instruments * solid state voltage regulators * ferro resonant transformer regulators
- 8. pcb *Pcb means printed circut borad its small electronic components in electornic circuit boards.
- 9. * solid state voltage regulators
- 10. * ferro resonant transformer regulators
- 11. * Servo stabilizer *
- 12. CONSTRUCTION OF STABILIZER
- 13. WORKING PRICIPLE OF STABiLIZER
- 14. Uninterrupted power supply (ups) * Uninterrupted power supply are used to provide continuos power to the computer * * off line ups * on line ups
- 15. * off line ups * Disadvantages
- 16. * on line ups * advantages
- 17. Surge suppressor and spike isolators
- 18. Installation practice FDD JUMPER FOR DRIVE SELECT * FDD cable twist * FDD terminator *
- 19. * Memory jumpers * Cable connection orientation *processor heat sink/colling fan
- 20. Preventive maintenance Parts Type of maintenance 1. Floppy disk drive Head cleaning, speed checking. 2. Tape cartridge Head cleaning and Alignment 3. Printer Cleaning and oiling 4. Mouse Cleaning the optic lens . 5. Keyboard Use vaccum cleaners to clean the dust 6. Mother Board Change CMOS battery once in two years and dusting
- 21. * Cotton swab * Isoprophyl alcohol * Vaccum cleaners * Head cleaning disk * Cleaning solution. * Tape drive head cleaning cartridge
- 22. Problem cause * Following * * dust * High temp * Electrical noise and interference * Magnetic fields * corrosoin * power fluctuations * improper handling
- 23. PROBLEM EFFECT PREVENTIVE MAINTENANCE 1. dust Head crash in hard disk and Regular cleaning of the system cd drive, blocks the cooling and the room . fan and damages the processor’s . 2.High temperature Data loss , electronic Provide a/c components and circuits failure 3.Electrical noise Causes malfunctioning of Isolate the system current and interference circuits from other loads and use filters 4.Corrosion Affects the stored data in Keep the system current away magnetic medium such as from magnetic devices such as floppy and hard disk TV etc 5.Magnetic fields Affects PCB and the PCB edge Control the humidity contacts 6.Power fluctuations Data loss , damage of switch in Use stablizers and , ups , the keyboard filters
- 24. PROBLEM EFFECT PREVENTIVE MAINTENANCE 7. Improper handling Data loss, damage of switches Use the keyboard gently , in the keyborad etc always keep the CD and DVD inside the Covers
- 25. peripherals * A peripheral is a device attached to a computer * * keyborad * printer
- 26. * Keyborad preventive maintenance * * do not apply force on the keys * do not rest the hands on board * do not keep anything on the board * do not spill liquids * use vaccum cleaners
- 27. *printer preventive maintenance * * Do not place the printers near the heat machines * Clean the outer cover using domestic cleaning liquids * Clean the inner parts using domestic cleaning liquids * Use quality ribbons and toners
- 28. *General precautions* * Before switch off the mains switch off the monitors * Unscrew the screws and remove the cables before removing the ciruits boards or pheripherals * switch off the system before removing a pcb or removing cables * Remove the CD and dvd from drive before shutdown * do not allow to eat or drink near the systems
- 29. * do not smoke near the system * Always use dust covers when not used * Store cd, floppy disketts in a clean and cool place * place the system in max air circulation area or in an air conditition room * clean the cooling fans window regularly * Do not bend or scratch the cd *do not switch off the system when the active red led is glow
- 30. * clean the cooling fans window regularly * Do not bend or scratch the cd *do not switch off the system when the active red led is glow
- 31. Fault elimination process * Two parts * * finding correct fault * eliminating the fault * finding correct fault is a technique ./ sometimes a simple problem takes much time for identification . Some faults can be found by checking the various components , voltage pins / cables / earthing / jumper settings , switches
- 32. General faults in systems * Dead system * Spurious problem * Security failures * Heart beats * Multiple faults
- 33. * Dead system * * It is very easy to confirm whether a system is dead or alive * Normally it is simple to give lifi to a dead system than rectifiying a sick system * dc voltage is absent * the clk signal is absent * firmware is corrupted * rom output is inactive
- 34. * Microproccesor is fault or dead * The ac fuse is blown
- 35. * Spurious problem * * Spurious problem are nothing but hidden problems that are very hard to find * * Finding these problem needs careful observation * * the dc voltage has excessive ripples * dc voltage is noisy
- 36. * Security failures *
- 37. * Heart beats *
- 38. * Multiple faults *
- 39. Systematic trouble shooting * Symptoms observation * Symptoms analysis * Fault diagnosis * Fault rectification
- 40. * Symptoms observation *
- 41. * Symptoms analysis *
- 42. * Fault diagnosis *
- 43. * Fault rectification *
- 51. Diagnostic software and viruses * Computer viruses *
- 52. Virus feel act
- 53. Precaution to ba taken to avoid viruses
- 55. * norton * * Norton is an antivirus softwares. It is used to protect the computer resource from known viruses * with help of thsis we can detect the malwares and detect and clean the known viruses * since new viruses are evolving every day * the norton number of version in softwares
- 56. * updates * * The latest version suports all type of softwares * * norton antivirus 2000 * norton antivirus 2001 * norton antivirus 2002 * norton antivirus 2003 * symantec norton antivirus 2004 outdated
- 57. * Features * * Automatically removes viruses, worms and trojan horses * Scans and clean both incoming and outgoing e mail messages * Detects and blocks viruses in instant messages attachments * Downloads new virus updates automatically * Worm blocking
- 58. Identify the signature of virus
- 59. * Firewalls *
- 61. Ip packet screening routers
- 63. THANK YOU