Capter 20 / Hardware and Network troubleshooting.

Question 1

some of hardware problems’ symptoms are:

987

Answer 1

Excessive Heat
Noise ( like creeping chips)
Odors and smoke
Status  light indicators
Alerts
Visible Damage
POST Routines

Question 2

there are two ways to determine a problem during the POST what are they ?
991

Answer 2

1 listen for a deep code.
2 use a POST card ( it is a circuit board that fits in to an ISA or PCI expansion slot in the motherboard and reports numeric codes)

Question 3

if the fans or heat sinks of a computer are covered with dust, dirt, grime, paint or smoke, that can lead to excessive heat in the computer, what can you use to clean up you computer?
987

Answer 3

we use a can of compressed air.

Question 4

if you hear a noise in your computer what will you first think about?
988

Answer 4

Lose component.

Question 5

if your computer heats up you can remove expansion slots covers to help it cool down. True/ false?
995

Answer 5

False, because extra holes change the airflow.

Question 6

what can be the problem if the only thing working in your computer is the power supply fan?
996

Answer 6

the problem can be any thing from the motherboard to the CPU, Memory, peripherals and more.
to solve the problem we unplug all the peripheral from the motherboard to see if the problem is the motherboard, if the motherboard is working good we move on to the peripheral we blug them back one at the time until we find the problem.

Question 7

if the motherboard is fried what do you need to do before you replace it?
996

Answer 7

we need to check the power supply to see if it is working properly, for that we use multimeter or a power supply tester.

Question 8

what can be the problem if your computer slow down on the read/ write file?
997

Answer 8

the first thing to check for will be the hard drive, because if the hard drive does not have enough free space it can slow down your computer. ( 10% of free space )
to solve the problem we need to free some space by Defragmenting the hard drive.

Question 9

what is behind your video problem?

999

Answer 9

the problem can be from the video card, the monitor or the driver.

Question 10

what can it be if your system is booting any in a VGA mode ( 16 colors and 640x480 ) ?
1000

Answer 10

one of two:
1- the video card is set to a resolution it can not handle.
2- the video card driver is not loading properly.

Question 11

dead pixels in a screen can be fixed. true / false?

1000

Answer 11

false.

a dead pixel is a spot on the screen that never light up, there is no way we can fix it.

Question 12

what is the first thing to check for if you have a no working device?
1002

Answer 12

check to see if the power is plugged in.

Question 13

what to do if your image is dim or flickering in an LCD monitor ?
1000

Answer 13

Replace the backup light or the inverter.

Question 14

what do you need to do when your laptop is working only when plugged into AC but not working when on battery power?
1002

Answer 14

the battery need to be replaced.

Question 15

Haw can you help conserve laptop’s battery life?

1002

Answer 15

windows have a power option applet in control panel, where we can adjust the setting to maximize the battery life.

Question 16

video problems in laptop are related to what?

1003

Answer 16

• video card ( built in motherboard )
• the display unit.
• if the connection between the motherboard and LCD screen is damaged.

Question 17

what is toggling the display mean ?

1003

Answer 17

is when you direct the video out put to an external device by pressing the function key + LCD cut off switch ( F4 or F8)

Question 18

what to do when the keyboard is not responding ?

1004

Answer 18

try to reboot the system.

Question 19

what does the Fn key do when it is stuck on?

1004

Answer 19

the only keys that will work are those with the function on them.

Question 20

if in a dot-matrix printer you have a small black line running through a line of print consistently, what will be the problem and will you do to solve the problem?
1007

Answer 20

that will be that the print head pin stuck inside the print head.
the solution for that is to replace the print head.

Question 21

Sometimes you’ll print out some information to the printer, and it’s just garbage. It’s a bunch of noise and nonsense on the page. what will be the problem?

Answer 21

You’ll want to check to see what kind of printer driver you’re using.

Question 22

the majority of inkjet printer problems are related to what?

1010

Answer 22

ink cartridge.

Question 23

you can perform 3 tests to narrow down which assembly is causing the problem in the laser jet what are they?
1022

Answer 23

the engine self test
the engine half self test
the secret self test

Question 24

the engine self test

1022

Answer 24

this test causes the printer to print a single page with vertical lines, if this test is performed that mean that the printer can print successfully.

Question 25

the engine half self test

1023

Answer 25

you can stop the half self test at any point of the printing process to determine the source of malfunction.

Question 26

what can cause you inc-jack printer to have a paper jams

1011

Answer 26

a worn pick up roller

the wrong type of paper.

Question 27

a laser printer’s DC power supply 3 different DC supply what are they ?
1014

Answer 27

pin 1 +5v
pin 5 -5v
pin 9 +24v

Question 28

how many pins are in the power interface of a laser printer?

1014

Answer 28

20 pins female interface

Question 29

what are the 3 major causes of blank pages/

1017

Answer 29

the toner cartridge
the transfer corona assembly
the high voltage power supply