HARDWARE PROBLEM SOLVING TUTORIAL

COMPUTER HARDWARE TROUBLESHOOTING 

CHAPTER 1  -    HARDWARE TROUBLE SHOOTING                                                                                                                                                                                                                                               The following are the some of the remedial action that can be taken during the problems listed.

PROBLEMS	PROBABLE SOLUTION
1)      While switching on the system, error is shown as “KEY BOARD MISSING”	Check whether the cable from key board is connected to the system in the backside.
2)      When switching on monitor light glows, but no symptom in the PC.	Check whether the power cable is connected to the system.  Check whether there is power supply in that point.
3)      When switching on the computer, system starts. But no symptom in monitor.	Check whether the power cable is connected to the monitor. Check whether there is power supply in that point.
4)      When switching on the system, system starts. Monitor light glows.  But no display.	Check the brightness, contrast settings of the monitor.
5)      After switching on, the computer restarts automatically, frequently.	Check the power supply for consistency.  There may be heavy fluctuation.
6)      Mouse movement is very jerky.	There may be heavy dust accumulated under mouse ball.  Turn the mouse upside down. Take off the cover & the ball . Clean the ball with soft cloth.  Put the ball back & replace the cover. Use a good mouse pad with smooth surface.
7)      Key board keys are not working properly.	Paper bits/clips may be accumulated inside the key board preventing the keys to function properly.  Turn the key board upside down. Shake out any paper, paper clips that can be inside.
8)      In Printer, consistently faded or light characters are printing.	Replace the ribbon with new one.
9)      A small, blank line is printed consistently.	Print head pin defective. Replace print head.
10)  Print head gets struck on one side while printing.	Dust may have accumulated in the print head moving rod.  Clean it with 3-in-1 oil.
11)  Printer is switched on. Even after print command is given, no print out.	Check whether the ‘online’ button is switched on. Check whether the printer data cable is connected to the system.
12)  In laser printer, if printing is light and dark and in some places disappearing.	Ink may have become dry.  Take out the Toner out of the printer, shake it gently and put it back in the printer.  If the problem still persists, refill / replace the toner.
13)  UPS output stops immediately after power off.	Batteries are not charged properly. Fill with distilled water, in case of maintenance batteries. Identify the defective battery and replace, in case of Sealed Maintenance Free batteries.