DIPLOMA - 5TH - CSE / SYLLABUS - COMPUTER TROUBLE SHOOTING AND MAINTENANCE

DIPLOMA - 5TH - CSE / SYLLABUS - COMPUTER TROUBLE SHOOTING AND MAINTENANCE

CHAPTER - 1 FUNDAMENTALS  Definition: Troubleshooting, Diagnosis - Classification of Faults: Hardware faults: Static faults, Dynamic ... 09:40

CHAPTER - 1 FUNDAMENTALS

•  Definition: Troubleshooting, Diagnosis
• - Classification of Faults: Hardware faults: Static faults, Dynamic faults,
• Software faults: System software fault, application software faults.

CHAPTER-2 GENERAL TROUBLESHOOTING

•  General Troubleshooting Rules
• - Study of abnormal behavior of PC system for fault finding, Write everything down, Do the easy step first, Reboot and try again, refer system manuals documentation, Observe facts (Ref mark minasi’s)
•  Steps of Troubleshooting Success
• - Check for operator error
• - Check everything plugged in.
• - Check the software
• - Check external signs
• - Run diagnostic programs (Ref. Mark Minasi’s)

CHAPTER – 3 MOTHERBOARD TROUBLESHOOTING

•  Motherboard Troubleshooting (Rectification in case of following probable symptoms)
• - RAM error
•  Not enough memory or out of memory
•  Expanded memory unavailable
•  This program has performed an illegal operation and will be shut down
•  Fatal exception error
•  CMOS checksum error
•  A motherboard failure is reported but goes away when the PC's outer cover is removed.

CHAPTER-4 FLOPPY DISK DRIVE (Controller, Hardware And Maintenance)

•  Introduction
•  FDC system interface
•  Disk Drive block diagram
•  Troubleshooting floppy disk system
• - Drive cleaning
• - Track - 00 - test
• - Error code and beep code
• - Symptoms of failure
•  The floppy drive is completely dead
•  The floppy drive will not read from or write to diskette
•  O.S. reports an error, such as "can't read from drive A:"
•  When a new diskette is inserted in the drive the directory from a previous diskette appears
• - The floppy drive activity LED stays on as soon as computer is powered up.

CHAPTER – 5 HARD DISK DRIVES (HDD)

•  Introduction to HDD
•  HDC device interface
•  Drive concepts
• - Latency
• - Track, sector, and cylinders
• - Landing zone
• - Write pre-compensation
•  Concepts of drive formatting
• - Low level formatting
• - Partitioning
• - High level formatting
•  Drive testing and troubleshooting
• - Error codes and beep codes
• - Rectification in case of following symptoms:
• - Symptoms and solutions of
•  You see drive activity, but the computer does not boot from the hard drive
•  Error occurs during drive reads or writes
•  The hard drive was formatted accidentally
•  The hard drives root directory is damaged
•  A "sector not found" error message appears on the monitor
•  A "17xx error" appears on the monitor
•  An "Error reading drive c:" error message appears
•  A "track zero (0) not found" error message appears
•  A "hard disk controller failure" message appears on a monitor
•  "Disk Boot Failure", "Non-System-Disk" or "Non ROM Basic - SYSTEM HALTED" error message appears
•  A "File allocation table bad" error appears

CHAPTER-6 DISPLAY ADAPTER

•  Introduction
•  CRT controller principle
•  Video cards
•  MDA, CGA, EGA, VGA, SVGA, XGA, AGP
•  Video memory and video RAM
•  Troubleshooting a monitor
• - Error codes and beep codes
• - Symptoms and rectification
• - A single horizontal/vertical line appears in the middle of the display
• - Raster is present but there is no image
• - There is no image and no raster
• - The displayed characters appear to be distorted
• - The image appears to flip or scroll horizontally/vertically