Expert System For Personal Computer Mendiagnosakerusakan Method Using Certainty Factor

- Along with the development of information technology, computers today have developed rapidly so that they require a higher technology world. Nowadays computers can be made in the category of human needs, Because they can help or human Facilitate work in various fields. The use of computer laboratories at Sei Bamban YAPIM Private Vocational School is very dense, so the level of computer damage is greater, both in terms of hardware and software. Here the author will discuss Expert Systems to Diagnose Damage to Personal Computers, the Certainty Methods Method is one of the Expert System Methods to Be Able to diagnose damage to a Personal Computer. In this case the Certainty Factor method is used to diagnose damage to the Personal Computer through existing symptoms. The damage is taken from symptoms that may occur and then given a decision and provide Appropriate solutions to Overcome damage to the Personal Computer. The symptoms of damage to the Personal Computer will then be changed in the form of applications. To create an application the author uses Microsoft Visual Studio 2010. This thesis will explain the damage report and solutions for Personal Computer.


Introduction
The development of Information Science and Technology is currently very influential in the world of education, business and in everyday life. many benefits from the development of Science and Information Technology as the ease of accessing information quickly, a medium of learning for education, and so on.Expert System (Expert System) is a computer-based system that uses knowledge, facts and techniques in solving problems that normally can only be solved by an expert in the field. Vocational School (SMK) Private YAPIM Sei Bamban Having a computer lab that is used as a proposition for Teaching and Learning Activities (KBM). The use of computers in the lab are also very solid in accordance with the schedule of teaching, so the risk of damage to the Personal Computer (PC) becomes larger. Diagnosing damage to personal computer (PC) using the method of Certainty Factor can help identify damage to the PC based on the symptoms that arise and provide solutions for damage tersebut.Metode this is a method to prove the uncertainty of thinking of a master,

A. Problem analysis
Analysis is very berpengaruhterhadap stage next process, where the goal is for systems that already exist today that will be developed later. The process for diagnosing damage to personal computer (PC) dibbahas in the application of expert systems using certainty factor.

B. Discussion
In the operation of a personal computer, of course, we often encounter the problem of damage in use or operate a personal computer, as often happens very long loading, keyboard / mouse dead ataublank error monitor, and so on. This can be caused by a lack of care on a personal computer or the components of the personal computer has begun to weak or damaged, then it needs to do analysis on a personal computer proficiency level if necessary dilakuakan maintenance and repair. Personal computers in the damage analysis method used is the certainty factor method. The stages were carried out to analyze the damage to personal computer are as follows: a) Data analysis The data analysis consists of three, namely, as following: 1) Research Sites In a research settlement expert system for diagnosing damage to the personal computer (PC) is done in private vocational YAPIM Sei Bamban.
As for the things which the authors observed in this study are as following: -symptoms of Damage type of Damage -

Damage Solutions b) System Requirements Analysis
In systems engineering and software engineering system needs analysis include the determination of the needs of the jobs or conditions to be fulfilled in a new product or product changes, which take into consideration the various needs that intersect between the various stakeholders. The need of the results of this analysis should be carried out, measured, tested related to the needs identified and defined to the level of detail sufficient for system design. As for the necessity of the system is as follows: a. Functional Requirements Functional requirements is a description of the activities and services that must be provided by the system. Things become functional requirements are asfollowing: -input Data inputs are used in expert systems of a predicament is the symptom data damage the personal computer.
-Process To produce output, the expert system will process the data with certainty factor method.
-output Processes performed by the expert system to diagnose damage to personal computer (PC) will produce output in the form of damage along with damage solutions. Non-functional requirements are requirements by sistemyang aims to support the functional requirements that have been determined.
-performance A system built to provide accurate results. -Easy to use The system is built easily used by anyone, without having to go through an expert. -Economical With this system, can reduce the cost of care as well as improvements on the personal computer.

c) Built Systems Analysis
Analysis carried out by the system built several steps: -Identifying the symptoms of damage to the personal computer.
-Diagnose or determine the type of personal computer damage.
-Providing solutions or advice against such damage.
To build this system, the author uses the method certainty factor in the decision. This system can make the diagnosis of damage to the symptoms of damage on the personal computer. This uncertainty can be a probability that depends on the results of a symptom. Mengmasukkan dalah fault symptom will result in the kind of damage that is not certain.

C. Certainty Factor Analysis Method
In this study, to build an expert system application authors use the programming algorithm Visual Basic application using Microsoft Visual Studio 2010 for the design of the system and Microsoft Office Access 2007 as the medium used to build a database, which will be used as a medium for data storage of symptoms -gejala damage, type of damage and damage diagnostics solutions for personal computers, as well as input and output media on the design of the system.
The technique used to downloaddiagnosis of damage to the personal computer is using a technique or method for menggunakanmetode certainty factor is very appropriate to look for a certainty, and this technique can also be used for other research such as diagnosing heart diseases, diseases of animals / livestock, and so forth. Here is the algorithm of the system at the completion of the expert system to diagnose damage to personal computers, namely: 1) Inserting a PC damage symptoms. 2) Enter the type of damage to the PC. 3) Including the value of MB (measure of Increased belief) the size of the increase kepercayaandan MD (measure of Increased disbelief) the size of the increase in distrust. 4) Determining the production rule (rule). 5) Calculation methods certainty factor (CF). 6) The calculation result and diagnosis of damage.

d) Inserting a PC Damage Symptoms
Here are the symptoms of damage to the PC: Table1 Symptoms Damage to the PC.

G01
Lamp power die G02 Alarms do not live G03 CPU fan occasionally spinning / sometimes not G04 There is no display on the monitor / no signal G05 Dirty RAM / loose G06 Reading system motherboard RAM installed G07 processor heat G08 Bad sectors on the disk G09 There is a faulty electronic components on the motherboard G10 Power supply is not stable G11 VGA gross / loose G12 Operating system damaged G13 Over load in the operation of computer G14 Chipset motherboard or VGA too hot (over) G15 Processor heatsink fan death G16 Lock heatsink loose or broken

G17 Unstable electricity voltage (up and down) G18
Hard drive is hot G19 USB connector loose / loose G20 Cables are damaged or broken G21 Yet BIOS setting for USB keyboard G22 The mouse movement fractures G23 The mouse movement is slow G24 Mouse sometimes moves sometimes not G25 Mouse does not move at all G26 Error installing jumper sound when assembling G27 Sound driver installation errors G28 Sound card loose / loose G29 Beeps twice G30 Sound one long beep

e) Insert type PC Damage
The following types of damage to the PC: -If it does not work, replace the power supply which is nice.
-If that does not work, the last step is to replace the motherboard with a new one that corresponds to the processor.

K04 computer Hang
-Clean the processor from dust.
-Check that the fan spins at 2200 rpm and above.
-Add thermal paste on the top of the processor.
-Reinstall the operating system.
-Replace the hard drive.

K05 Computer Shutdown
-Check the power supply is functioning properly or not.
-If not, replace the power supply with a good power supply.
-If not successful, then replace the motherboard with a new one corresponding processor.

Restart the computer Alone
-Voltage electricity is not stable (use a stabilizer to stabilize the electric power).
-Faulty RAM (RAM disconnect it from the slot, then Cleaning your RAM with a pencil eraser or wipes, try not to touch the hand of a pin RAM as it will cause corrosion or rust, and then clean the RAM slots with a brush or vacuum cleaner mini. -Hard Drive broken (turn off the computer first, replace the hard drive power cable and restart the computer, if it does not work, replace the data cable IDE / SATA hard drive and restart the computer, if it does not work, then replace it with a new hard drive). -The operating system is damaged (lalukan process system repair or reinstall the operating system).

K07 keyboard Error
-Check the RAM.
-Check the power supply.
-Check whether the driver has been installed or not.

K08 mouse Error
-Check the RAM.
-Check the power supply.
-Check whether the driver has been installed or not.

f) basis Rules
The rule base between the type of damage and the symptoms would be explained in the following tabe:

g) Entering Values MB and MD
The following MB and MD values of each symptom in each of damage, namely:

) Calculation Results and Diagnosis
So, based on calculations that have been done it can be concluded Alternative 1 to 5 symptoms would get a diagnosis of computer damage dead with 62.2975% percentage that is almost certain. Solutions of diagnosis such damage is replace power cable from the power supply are normal, if it does not work, check the wiring panel mounted on the motherboard, if it does not work, replace the power supply with a nice, if not managed well, the final step replace the motherboard with a new one in accordance with the processor.

Conclusion
Based on the description and discussion of the analysis of the tests, it can be concluded on the Expert System for Diagnosing Damage to Personal Computer Using Certainty Factor method is as follows: a) Designing applications expert system for diagnosing damage to the personal computer. b) Applying the method of certainty factor in the application of expert system to diagnose the symptoms of damage to the personal computer. c) Build a system to diagnose damage to the PC with the symptoms that occur with certainty factor method.