SYSTEM TROUBLESHOOTING

TROUBLE-SHOOTING: this is the process of inserting a problem, so as to pin-point the real cause. To be an effective troubleshooter, you must approach the problem in an organized manner. There are five phases of troubleshooting.

•     Define the problem
•     Zero –in on the cause
•     Conduct the repair 
•     Confirm the result
•    Document the result

Defining the problem: for you to be able to tackle the snag, listen to the client and co-worker i.e. the computer user.

He/she is your source of information. Don’t assume you know.

Questions such as the following can be asked:

•  Was the computer working properly?
• When did you first notice the problem? 
• Was the computer moved recently?
• Have you made any changes to the hardware or software?
• Can you reproduce the problem?
• What does the error look like?
• Were there any error messages?
• Are there current back-up of the system and data files available?

Zero –in on the cause : this involves the process of insolating the problem the best method in this regard is to eliminate any obvious problem and work fro the simplest problem to the more complex.

Repair or replace: after locating the problem, you can either repair or replace the defect. If the problem is software related, be sure to record the “before” and “after” changes

Confirm result: no repair is complete without confirmation that the job is done. Confirmation includes two steps;

1. Make sure that the problem do no longer exist and ask the user to test the solution and confirm the client’s satisfaction
2. Make sure that the fix did not create other problems.

Voltage Distribution on a computer system

The power supply unit of a computer system unit can be defined as the unit which energizes the circuit of the system.

There are basically two types of power supply unit in a computer system.

AT [advanced technology]

 This refers to the computer supply type which makes use of two pin connector [P8 and P9]. The two pins are attached directly to the motherboard to supply a  d.c to the motherboard. The AT power supply makes use of manual switching circuit.

When 220/240v a.c is supplied via the wall socket into the computer system, the power supply unit of the computer system step-down and converts the voltage to 12v d.c.

NOTE: when installing the connectors on the motherboard, the two black wires [from the P8 and P9],must face each other.

Direct current [D.C]: This refers to current that flows in one direction

Alternating current [A.C]: this refers to current that flow in a sinusoidal way

ATX Power Supply Pinout

ATX [advanced technology extension]: this is the power supply unit type which is found on most modern systems. It supplies 12v d.c into the motherboard which is then distributed evenly   as outlined below. The two connectors are joined together unlike that of AT in which the two connectors are separated.

Below is a table displaying the voltage distribution on a Typical Computer System.

Study carefully

Mini Laptop - A Better Substitute To The Normal-Sized One

     When a person is on a search of a device that is more suitable to carry and that is more portable to keep all the important data along, Mini laps are up on top to serve the particular purpose. These laptops are a more modified type of laptops which you can call small computers. They provide you with all the benefits which a computer system can give. The important reason why people are fond of using them is because they just want to avoid the Macbook Replacement screen problem or iPad parts substitute problem, as they come up with strong and strengthened models. 
 Let us talk about some more advantages which this laptop can give:

The first and the foremost reason, why people buy mini laptops are its portability and faster processing. They have built-in installations of Windows XP and the built-in hard drive with a space from 512MB to 2.0GB. The second most important reason, is its price range, people who are fond of keeping a laptop get a relative inexpensive mini laptop with all the essential features which a normal laptop have.

One good advantage of these laptops is their battery time. There battery time is much more than a normal laptop. Due to small machinery and due to the presence of mercury element in their batteries, keeps the mini laptops charged for about 5 to 6 hours of working. This adds one more essential feature in their structure.

People buy laptops because they are tired of sitting at one place and doing their work in a normal computer. Some want a laptop because of office work purpose. This type of laptop provides all the basic elements which a normal computer can give. They are easy to carry and can be at anywhere and at anytime.
A normal size laptop is around six to seven pounds but this small laptop is around two to three pounds just like the weight of a normal size calculator. The weight is considerably lighter than a normal size laptop which makes it much easier to transport.

People who are always with some quick projects, and which require an urgent submission of their assignments, their preference is a mini laptop. It is widget that proves to a sounder feature in their lives. Those who travel a lot also prefer these laptops. Kids with small assignments and school projects can also mini laptops. And even a business student who is always filled with his business assignments and presentations can get a better advantage from mini laptops.

A normal priced small laptop is around $300 to $350 depending upon the model you prefer to buy. 
There are many offers online, which can provide you with all the latest information regarding the characteristic and features of a mini laptop. Most common colors that are seen mini laptops are silver, metallic black and carbon black. You can go with all the latest and current offers with different types of models on mini laptops on the internet to find the one which best suit your needs and requirements.  
For more info on Macbook replacement screens go to http://www.etechparts.com/ .

How To Watch TV On Your Computer

     It could be that you live in an area where cable TV is not available or perhaps you don't want to pay those outrageous fees to the cable TV company each month. Maybe it's just that you want to have the freedom to watch your favorite shows when it's convenient to you. No matter what your reason, the good news is you can watch TV on your computer and it's not going to cost a lot of money!

It's Simple - Really Simple!

You only need three things to watch TV on your computer. First, you need to have a decent computer. This does not mean you need the latest and greatest model but you do want one with good video and audio cards and sufficient speed to keep the programs and movies playing without lagging.

Next, it is important to have a good, consistent internet connection. Dial up is not going to work but any DSL or cable internet connection will work great. Satellite connections are generally not as reliable.

Finally, you will need good streaming TV software. This is really important. This software pulls TV streams from all over the internet. You no longer have to search for a site that offers an episode of your favorite TV show, only to find sites that want you to download a video player or sign up to receive hundreds of spam emails.

The Advantages

The benefits of watching TV programming on your computer are many. Convenience is one of the main advantages, since you can watch these shows and movies on your own schedule. Cost savings is another benefit. In order to record your favorite programming, you may have to rent equipment from the cable or satellite company. These are expensive and should you damage one, the replacement fees are significant. You won't have to worry if you set the DVR to record, either. When you watch TV on your computer, you can also do away with many of those annoying commercials. Most of the streams only have limited interruptions. This also means that it doesn't take as long to finish one episode and get onto another.

Which Streaming TV Software Is Best?

There are a number of free software programs available online but in all honesty, it is best to choose one that requires a small, one-time fee. Paid for software reduce the chances of getting spyware or adware and you won't have to put up with the advertisements from sponsors. There are also streaming TV software programs that require a monthly fee to access; however, the one-time fee software is just as effective. Check the review sites to see which ones come highly recommended by customers. A bit of research is always best. Once you download and install the software, you can watch TV on your computer for no charge at all.

It is much easier than you might think to watch TV on your computer. It doesn't require special equipment and the set is simple. The key to the best selection is the right streaming TV software. It will ensure that your viewing experience is as close to regular TV programming as possible.

Discover how you could watch tv on your computer for free.Visit:http://www.freemoviednlds.com/Watch_TV_Online.html

How To Watch TV On Your Computer

It could be that you live in an area where cable TV is not available or perhaps you don't want to pay those outrageous fees to the cable TV company each month. Maybe it's just that you want to have the freedom to watch your favorite shows when it's convenient to you. No matter what your reason, the good news is you can watch TV on your computer and it's not going to cost a lot of money!

It's Simple - Really Simple!

You only need three things to watch TV on your computer. First, you need to have a decent computer. This does not mean you need the latest and greatest model but you do want one with good video and audio cards and sufficient speed to keep the programs and movies playing without lagging.

Next, it is important to have a good, consistent internet connection. Dial up is not going to work but any DSL or cable internet connection will work great. Satellite connections are generally not as reliable.

Finally, you will need good streaming TV software. This is really important. This software pulls TV streams from all over the internet. You no longer have to search for a site that offers an episode of your favorite TV show, only to find sites that want you to download a video player or sign up to receive hundreds of spam emails.

The Advantages
The benefits of watching TV programming on your computer are many. Convenience is one of the main advantages, since you can watch these shows and movies on your own schedule. Cost savings is another benefit. In order to record your favorite programming, you may have to rent equipment from the cable or satellite company. These are expensive and should you damage one, the replacement fees are significant. You won't have to worry if you set the DVR to record, either. When you watch TV on your computer, you can also do away with many of those annoying commercials. Most of the streams only have limited interruptions. This also means that it doesn't take as long to finish one episode and get onto another.

Which Streaming TV Software Is Best?

There are a number of free software programs available online but in all honesty, it is best to choose one that requires a small, one-time fee. Paid for software reduce the chances of getting spyware or adware and you won't have to put up with the advertisements from sponsors. There are also streaming TV software programs that require a monthly fee to access; however, the one-time fee software is just as effective. Check the review sites to see which ones come highly recommended by customers. A bit of research is always best. Once you download and install the software, you can watch TV on your computer for no charge at all.

In Closing

It is much easier than you might think to watch TV on your computer. It doesn't require special equipment and the set is simple. The key to the best selection is the right streaming TV software. It will ensure that your viewing experience is as close to regular TV programming as possible.


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ROM BIOS

BIOS is an acronyn for Basic Input Output Software.

This software is stored on a ROM chip located on the motherboard of computers.

When a computer is turned on, the BIOS executes a task called "POST"(Power On Self Test) Which makes sure all necessary Hardwares e.g keyboard, hard disk est. are intact and functioning. Once this is done it then hands over to the Operating System on the computer. Hardwares are detected and Configured by the BIOS, the BIOS is also used to set boot order amongst other functions.

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2011!

Happy New Year! to everyone on COMPUTER ENGINEERING PLANET.
I love you all!