Keyboard Problems:
1. During initialization, “No keyboard error “ displayed or Complete non operation of the keyboard. „KEYBOARD FAILURE‟ message is displayed when booting.
Solution: Check the keyboard cable and ensure that it is connected properly into the PC connector. Reboot the system; Try with another compatible keyboard.
2. The keyboard completely dead; no keys appear to function at all
Solution: Check with another good keyboard; reboot system. Check the keyboard connector for +5V supply. If still doesn‟t work keyboard chip is at faulty.
3. Keyboard not functioning normal, some keys stuck or repeating
Solution: Short or jammed key. Some paper clips or other objects creating short circuit.
Clean the contacts and check. If keys are still not working, replace with old keys or replace keyboard assembly.
Hard disk problems:
1. The hard disk is completely dead
Solution: Make sure the hard disk supply and data connector connected properly. Check the CMOS setup for the recognition of the hard disk; save CMOS setting and reboot.
2. System does not boot up.
Solution: This can be either the boot sector failure or OS file corruption. Make sure the drive is connected properly; check the CMOS settings. Boot from some other devices and check for the recognition of drive.
3. Can‟t read from “C” drive
Solution: Check the disk using Scandisk utility for bad sectors. It may also indicate viruses; check for the antivirus utility.
4. Disk boot failure / Non system disk
Solution: Check the signal connector and make sure the data interface signal cables are inserted properly and completely at the drive and controller. Try with new cables.
Check for CMOS setup.
Mouse Problems:
1. The mouse cursor appears, but it only moves erratically as the ball moves
Solution: Check for the cable and connector for its proper connection. Check for the connector pins.
2. The screen cursor appears on the display, but it does not move
Solution: The above symptom shows that device driver is loaded properly and application program is communicating. Check the serial connection for bad
communication.
3. The mouse works for a few minutes, then stops
Solution: This problem occurs in mechanical mouse; for the faulty mouse circuitry.
4. A single mouse click works, but double click doesn‟t
Solution: This problem is because the double click speed is set too high in the operating system. Change the properties of mouse and correct the same.
Scanner Problems:
1. Common scanner problems include the inability to scan and poor- quality results.
2. Scanner‟s arm not moving indicating the lock at the bottom of the scanner not unlocked.
3. Slower Scanner can be made faster by increasing the RAM so that swap file size is increased.
4. If the image is blurry or distorted, make sure the original document is placed firmly and cover is closed properly.
5. If the quality of the image scanned is poor, make sure the scanner and scanner software is set to the appropriate setting for the type of image being scanned.