Preventive maintenance is the key to obtaining years of trouble-free service from your computer system. Preventive maintenance program reducing problem behaviour. data loss, and component failure and by ensuring a long life for your system.

Preventive maintenance also can increase your system's resale value because it will look and run better.

 

It includes several steps that promote a longer trouble-free life for your PC. It protects a system from the environment, such as power-protection devices: ensuring a clean, temperature controlled environment: and preventing excessive vibration.

 

1> Cleaning a System :

A regular cleaning of the system removes any layer of dust and benefits the system in the long run.

Dust acts as a thermal insulator, which prevent proper system cooling. Excessive heat shortens life of component.

The proper cleaning of the internal components, its peripheral and the boards inside the system, use the following tools and cleaning solution as per requirements.

 

Cleaning Tools :

Canned air

A small brush

Lint-free foam cleaning swabs.

Foam tape.

Antistatic wrist-grounding strap.

Low-volatile room-temperature vulcanising (RTV) sealer.

Silicon-type lubricant(WD-40).

Computer vacuum cleaner.

 

Cleaning solutions :

Standard Cleaners :

>> Trichloroethane

>> Isopropyl alcohol

>> Acetone

>> Freon

Contact cleaner/Lubricants :

>> Stabilant 22

>> WD-40

Dusters :

CFCS(chlorofluorocarbans) such as freon

HFCS(hydrofluorocarbons) such as difluoroethane

carbon dioxide

In cleaning system, use above tools as cleaning solutions to clean.

 

Clean the following things :

>> System board

>> Add on Cards

>> Connectors & Contacts

>> Reseating socked chips

>> Check SMOS battery backup.

 

The following are weekly maintenance check list :

Backup any data or important files.

Delete all temporary files.

Empty the recycle bin.

Check for and install antivirus software updates.

Run defragmantation program.

 

The following are monthly maintenance check list :

Create an operating system startup disk.

Check for and install any updated drivers for video cards, sound cards, modem and other devices.

Check for and install any operating system updates.

clean the system, including the monitor screen, keyboard, CD/DVD drives, Mouse, and so on..

Check that all system fans are operating properly, incluting CPU heat sink, power supply, and any chasis fan.

 

Preventive Maintenance of Hard Disk Drive(HDD) :

Hard disk preventive maintenance includes the following :

Making Periodic backup of your data & critical areas, such as boot sectors, file allocation tables(FAT), and directory structures on the disk.

You should defragment hard disk at least once a month to maintain disk efficiency and speed.

Delete all temporary files and wweb browser history and Temporary Internet files.

Take backup and format HDD at least once a year and reinstall all software to maintain disk efficiency and speed.

 

Following Precautions are required for HDD protection :

Provide good surge protection.

Do not keep HDD or CPU near the vibration area.

Ensure fitting of HDD, that the disk is fully secured and well suported in CPU cabinet.

Periodically perform scan for viruses.

Do not install freeware software such as games, utility programs that contains viruses.

 

Preventive Maintenance of Monitor :

Monitor fails due to following reasons :

Open circuit or disconnection inside monitor.

Short circuit inside the monitor.

Display is not stable.

Diagonal lines are present.

Screen is flickering.

Focus is not proper.

No control over brightness.

 

Precautions :

Switch off the monitor, before switching of mains.

Use dust cover for monitor when monitor is off.

Do not put monitor near to strong magnetic field, which may cause improper deflection.

Clean the display screen so that it is dust free.

clean the monitor exterior with mild detergent solution without allowing the water drip inside the monitor.

Provide proper ventilation such as cooling fan heat dissipation to avoid intermittent failures.

Do not put paper or anything on top of monitor.

 

Preventive Maintenance of Keyboard :

Handle the keyboard gently and carefully.

Press the keys gantly without applying force and do not rest hand on the keyboard.

Do not spill liquids on the keyboard.

Do not keep anything on the keyboard.

Do not play with the keyboard after powering-off the system.

Make sure that the cable is not subjected to high stress at the keyboard end. This will cut signal wires inside the cable.

Periodically, clean interior of keyboard with a miniature vacuum cleaner or turn it upside down to blow out the accumulated dirt.

Use dust cover for keyboard when not in use.

Clean conducting parts of keyboard, use denatured alcohol along with lint free material.

 

Preventive Maintenance of Printer :

Do not place Printer near heat generating machine, such as heaters and furnances.

clean the exterior of Printer using soft cloth with mild organic solvent.

Periodically clean out dust, paper fragments, and dirt from its mechanism using soft brush.

Use quality ribbon to avoid damage to print head.

Denatured alcohol canbe used for cleaning the inner parts such as stepper motor, Print head etc.

Verify the insulation resistence between AC Power line and Printer chassis.

Use the dust cover for printer, when not used.

Check the paper feed path is free of obstruction.

Clean the paper feed path, platen and ribbon path with soft cloth.

Lubricate mechanical parts.

Clean Printer-head slider rails using non-oily lubrications suahc WD-40.

 

 

Following are importance of Preventive Maintenance :

Preventive Maintenance gives reliable operation and long life to PC and peripheral devices.

It gives trouble free service from your computer system and peripheral devices.

It also increases your system's resale value because it will look and run better.

It avoids data loss on hard drive.

It will avoid remedial problems.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A hard disk is one of the important I/O devices and is most commonly used as permanent storage device in any processor. Most PCs have hard disk having capacities in the range of 20GB to 80GB. Due to improvement in technology and density of magnetic disk, it has become possible to have disk with larger  capacity and at a  cheaper rate. A hard disk is basically comprises several metal platters coated with magnetic material.  These plates are rotating with high speed(5,000 revolutions per second) along the central shaft. Each surface has a read/write head mounted on arm. The head can possibly move in radial direction. Usually , both sides of a platter are used for storing data. Each surface is divided into concentric circles called tracks. There are 300 tracks per platter. Each track is divided into about 30 sectors, separated by gaps. To access data in a specific location, the arm has to be positioned over the proper track. This takes about 3-20 minutes. Once the sector is found, the data can be read at a rate of 4 MB/s. The disk controller is requires for buffering  the data to avoid bus contention and for bookkeeping.

Hello guys , Yes you are right. I am talking about the blue screen error that often occurs in one's laptop or a desktop . It is really very annoying . We cant even save the work we are doing . Infact in some cases we cannot swith on our computer . Till date no one has found out a perfect solution of this problem . Some people say that you just wait , it will automatically go away . But friends it is a very serious issue , and it should be solved immediately or else it can do severe damage to the internal circuitry of your computer . First of all , does anyone of you know why it occurs . Well , according to me , there are many reasons of its occurrence . First of all it may occur if you not configured your hardware correctly . Secondly , knowingly or unknowingly if you have installed the wrong software which is not compatible with your hardware . So , basically it occurs when your software and hardware are not synchronizing properly . Some people also give overheating the reason of its occurrence , but i don't think if that is the reason . It generally occurs when you are installing a driver or a software . If the blue screen appears during the installation then there is no problem because the software you are installing is causing the problem . After you restart don't try to install that software again. If you have installed the software and then the problem is occurring then there is a serious problem . You should immediately uninstall the software or the driver from the control panel . If due to blue screen error your computer fails to start , then there is only one option available . You will have to install a new version of your OS . You can still save your old OS by installing the new OS in a different drive . But be careful because you will loose all the data on the drive in which you are installing the new OS . I tried to share my best knowledge regarding the most annoying "Blue Screen" error . Hope it proves to be useful for some of my friends over here .

PC is a machine with electrical and electronic circuits as well as electromechanical assemblies. For reliable operation and long life of PC, must consider various environmental factors.

The following factors affect the normal working of PC. These factors should be kept within the specified limits or tey to avoid these factor near PC for trouble-free operation.

1> Temprature [10° C - 45° C]

Affects :

Life of IC's and other components.

Encounter excessive chip creep.

Signal traces on circuit board can crack and separate.

Solder joints can break.

Contacts in the system can undergo accelerated corrosion.

Solid-state components such as chips can be damaged.

Temperature generates intermittent problems in electronic circuits

Early failure of electronic components.

Avoiding Temperature :

Install an adequate fan in the power supply or system.

Add an auxiliary fan.

Run PC's only in safe temperature range.

Install Air Conditioner in computer room.

Avoid direct sunbeam in computer room.

Use adequate space for computers.

2> Humidity [60° Relative humidity]

Affects :

Causes corrosion in the contact region, which in turn causes contact problems in the different components.

High humidity in low temperature will cause the surface oxidation effect on metal parts, such as electrical contacts & breakdown of insulation material in a power supplies & monitor.

Low humidity, high temperature and dry weather may create problems with static electricity.

May also generate sticky layer of dust on ICs and components, avoid heat dissipation.

May fails ICs and component.

Avoiding Humidity Problems :

Use dehumidifier.

Install Air Conditioner in computer room.

3> Dust :

Affects :

As dust buids up, entire board can become coated with fine insulating shealth. This avoids heat dissipation and damages ICs.

Reduces life of chips and various components.

It damages Magnetic tape storage of a computer. And causes head crash in Hard Disk.

Dust on read/write head crashes disk surface.

Keyboard may get affected with dust and dirt. It jams the keys and may cause improper functioning of keyboard.

Avoiding Dust :

The computer room must be cleaned regularly.

Clean the computer with dust free cloth.

Use vacuum to remove dust from the keyboard and system board.

Wndows in the computer room must be enclosed with curtains to prevent entry of dust.

Smoking in the computer room must be prohibited.

Use covers on different parts of computer such as monitor, system unit, keyboards.

Use Air Conditioner for computer room.

4> Magnetic Field Effect :

Affects :

Data storage on magnetic storage devices may get affected or corrupted.

May disturb electron beams of CRT monitor, causinf improper deflection.

Can cause permanent loss of data on hard disk.

Avoiding Magnetic Field :

Keep PC away from the Television.

Keep PC away from the Speaker.

Do not keep any permanent magnet or electromagnet near PC.

Do not keep any recording machine near to PC.