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Chapter12.txt
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Chapter12.txt
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##### Chapter Twelve #####
Identifying Problems wiht Hard Disk Systems
Symptom - slow performance or read/write failures
Causes - failing drive or lack of available space (-10%)
Fix - Optimize disk - perform disk refragmentation
Free Up Space - Relocate files & remove old applications to gain needed space
Symptom - Unable to boot the OS
Causes - BIOS unable to recognize the hard drive. Operating system cannot be found
Fix - Ensure BIOS properly detects hard drive - check and reseat connections
Boot into Windows recovery environment
use command line
execute the bootrec/fixmbr - rebuilds the master boot record
execute the bootrec/fixboot - rebuilds teh boot sector
S.elf
M.onitoring
A.nalysis and
R.eporting
T.echnology
Determines drives funtionsal status
Indicates drives shortcomings
uses various metrics
difficult to interpret - due to lack of indudstry standards
Benefits manuafacturers more than end-users
Analysis detect design flaws
Product Improvement
Redundant Array of Independent Disks
RAID Issues
Isolating the cause is complicated
multiple drives used in the Array
integrated vs installed controllers
software RAID issues challenging to diagnose
Depends on RAID configuration used
hardware-based RAID
Windows Disk Management utility (software RAID)
Array affected, but data is not lost - fault-tolerant design
Identifying Optical Drive Issues
Physical drive Problems
power connections - eject the tray to confirm power is applied
Data cable is properly attached
SATA connector uses 'key' for proper attachment
IDE cable connection must be oriented with a pin 1 (colored stripe on edge)
Allows BIOS to detect installation of optical drive
Typical issues are realated to 'disc' media (logical)
Symptom - Unable to read data from disc
Causes - inappropirate media type inserted in drive. dirty disc surface
Fix - leverage backward-compatibility concepts - DVD to read CDs and Blu-Rays or CDs. clean discs using recommended solution.
Troubleshooting Video Issues
Symptom - Booting into VGA mode
(VGA mode is the standard resolution of 640x480)
Causes - video card cannot support higher resolution setting. or video cards driver is not loading properly.
Fix - reset the video cards resolution to one it can handle
reinstall driver if booting to VGA mode persists
replace the video card if both attempts do not work.
Symptom - no image on the screen (desktop)
Causes - monitor is not working
probable video card malfunction after checking monitor
Fix - substitute know good monitor for the suspected bad one
reseat video card if switching monitors do not work
reinstall video cards driver if problem still exists
lastly, replae the video card because it is not working
Symptom - no image on the screen (laptops)
Causes - LCD is not working
Fix - Confirm power is applied to the laptop
toggle the display using the appropriate function key (reboot if persists)
if reboot does not display BIOS informtion, replace display
problem is a windows issue when:
BIOS information appears during reboot then LCD goes blank
boot into VGA mode to reset resolution or reinstall driver
replace display if al esle fails to correct problem
Malware Removal Steps
Identifying symptoms
Quarantine system
Remediate system
Schedule scans and updates
Educate users
Troubleshooting Printer Problems
Impact Printer Problems
Low print quality Causes
work-out ink ribbon - cartridge improperly installed or not replaced as needed
slipping ribbon advance gear
pin stuck insitde the print head
broken, loose or shourting print head cable
pin stuck in the out position (does not retract)
wrong driver installed
Bad PRintre Control Board (PCB)
Multiple sheets are picked up - worn seperator pad. paper sticking together
Power Problems
5&12 VDC voltages
transformed from 110-220 VAC input
for internal power circuits
Laser Printing Problems
Electrophotograohic (EP) imaging
most complex of printing processes
familiarity with the seven stages
facilitates identification of cause
Applicable fixed identified by specific symptoms
Periodic maintenence - prevents occurance of potentioal Problems
PRINTERS CANT EVEN DO THE FREAKING CLEANING
PROCESSING
CHARGING
EXPOSING (WIRING)
DEVELOPING
TRANSFERRING
FUSING
CLEANING
Power Problems
DC power supply +/- 5&12 VDC
Voltage Checks
if none present p replace fuse
one or more(not all) - likely replace DCPS
No Network Connectivity
Possible sources of connectivity problem
patch cable
NIC port and wall jack (attachment of patch cable)
Confirm IP Address
Netowrked printers, not local-printers
Confirm DHCP settings
Networked printers have static IP addresses
Nothing printers