Display Failure in Desktop Systems

Solutions

  1. Display problem will occur due to lot of reasons.
  2. We have to check both monitor and cpu individually to find out the problem.
  3. First we have to check the monitor separately, whether it will work or not.

SOLUTION 1:
  
 How to check monitor? 

                                                             Fig: Rear view of CPU

 
 Monitor:

                                                             Fig: Monitor

  i. Remove all the cables which are connected with your CPU.
  ii. Connect only power cable to the monitor and switched on.
  iii. After that the screen appears and a message will displayed on the screen "CHECKING VGA CABLE".
  iv. If the message comes on the screen then your monitor is proper.

SOLUTION 2:

 1. If monitor is  proper then check the CPU.
 2. We have to check whether the CPU is properly switched on or not.
 3. If it is proper then LED is flickering in front of the cabinet and we can hear the CPU fan sound.
 4. From this we come to know that the power section of CPU(SMPS) is proper.

                                                      Fig: SMPS(Switch Mode Power Supply)

SOLUTION 3: 

                                                        Fig: RAM

 1. When you turning on the CPU, a long beep sound will come from CPU due to RAM problem.
 2. If you hear the long beep, first you have to clean the RAM by using Eraser. Even you are having the same problem after that you have to replace the RAM based on the type what is yours.


SOLUTION 4: 
                                                     Fig: VGA Daughter Board

1. After turned on, you have to check the keyboard status by pressing NUM LOCK key whether green led on the keyboard is lighting or not.
2. Then if you hear the usual staring beep sounds and windows login sounds, you system has been successfully logged in.
3. In this case, the problem is display adapter.
4. Buy a new VGA Daughter Board then fix it in the PCI slot of Mother Board and get a new VGA connectin by fixing this.
5. Whenever you are making connection with CPU, for display you have to connect VGA cable with external cards. (Dummy the On Board VGA).

SOLUTION 5:

1. Due to huge dust in mother board and processor socket, display will not work.
2. In this case, you have to clean and reassembling your CPU.

SOLUTION 6:

                                                 Fig: Mother Board

                          
                                                Fig: Microprocessor

1. In Mother Board, some times major problem will occur like Chip Failure, Condenser Failure, IC Failure and Dry fault.
2. You can repairing or servicing the mother board by Service Engineers.
3. If they are unable to rectify the problem then you should replace the Mother Board.
4. Nobody will not be able to clear the problem in Microprocessors except manufacturer.

 References & Abbreviations:

1. MB - Mother Board(also called System Board, Planner Board, Main Board).
2. SMPS - Switch Mode Power Supply.
3. IC - Integrated Chip.
4. LED - Light Emiting Diode.
5. CPU - Central Processing Unit.
6. RAM - Random Access Memory.
7. VGA - Video Graphics Adapter.
8. PCI - Peripheral Component Interconnect.